New Circuits Page 275

In this circuit, A = 1, port = o.5, passive vent filter without distinction. When only care when dry l; Q = 1 / (3 - A), 12dB / oct filter of Butterworth King F0.707,4 mouth may be assumed ..

Shown for the active low pass filter circuit. Cut-off frequency fc of the circuit = 10kHz. Circuit, R1 and R2 ratio and the ratio of C1 and C2 can be various values. This circuit uses R1 = R2 and C1 = 2C2. Using C1 = C2 and R1 = 2R2 can. ..

Second order band-pass filter performance depends primarily on the quality factor Q and center frequency Si. In order to adjust the Q and. t a general first adjust R3 to change the Q value, and then adjust to change C 0. But the adjustment will affect R3 Si...

9-12V DC power applied to the control point A or point B, for amateur communication receiver IF amplifier, gives two different options. Power 455kHz, the bandwidth 500Hz, the f..

A typical two high-pass filter circuit ..

As can be seen from the circuit loop, the circuit is mainly two times a Butterworth filter, in order to make a 0.707, magnification feedback amplifier d was d 3- (1/Q) 1. 5860 ..

As shown by ISO122/124 -type filter circuit shown in FIG. ISO122/124 modem internal oscillator frequency is set to 500kHz, in order to suppress from the DC/DC converter is any ..

As shown for the trap circuit. The circuit uses a high-performance op amp device MC33171 constitute trap. The device has a wide band and a high conversion rate. In the illustra..

As shown in FIG frequency power supply noise filter circuit. The circuit is a double-T filter, can be used to amplify (such as sensors) weak signal, to mixed 50Hz (or 60Hz) pow..

As shown in FIG staggering low frequency active filter circuit. This is a fourth-order Butterworth low-pass active filters for filtered VLF random pulse noise voltage DC level ..

As shown in Figure 8 times the low-pass filter circuit. This circuit uses eight low-pass filter circuit switched-capacitor configuration. Changing the cutoff frequency of the c..

Band pass filter allows only signals within a certain frequency range pass through rather than the pass band lower frequency than the upper limit of the low and high frequency ..

Band-pass filter is a circuit diagram of a single channel described in this article, that the audio band-pass filter circuit diagram. Its fH 50Hz;, fl 13kHz, as shown below...

Band-pass filter used for a single channel, fH 50Hz;, fl 13kHz. ..

Band-stop filter (BEF) integrated operational amplifier, such electrical road performance and a bandpass filter contrary, that in a certain band, the signal can not be (or has ..

Broadband 0.1 to 10Hz filter amplifier Broadband circuit is composed of two operational amplifiers (0.1-10 Hz) filter amplifiers. ..

Capacitor filter works by the capacitance being measured is proportional to the pulse width and pulse width qualifying nominal capacitance comparing screening to detect. Circui..

Circuit offers passband gain 1,10kHz corner frequency for eliminating high frequency noise such as hiss, ticking, popping sound. ..

Common low-pass filter circuit commonly used low-pass filter circuit is shown. Figure (a) ~ (c) suppress high-frequency interference; Figure (b) of the varistor foot can absorb..

As ZKJ-S-type buffer controller circuit for motor starting slip control. Buffer controller by the two operational amplifier Ai and Az composition. Ai constitute a speed amplifier saturated, Az constitute an..

As shown in Figure II F003 is versatile photographic constituent operational amplifier amplifying automatic timer circuit. Operational amplifier A1 composition integrator..

The figure is composed by a NE555 and other withered frequency circuit by changing the self-excited multivibrator NE555 charging current to frequency modulation. The circuit is VT1 and VT2 constitute a current mirror circuit, the charging..

As shown in Figure 1 hour using a LM122 timer circuit. Start of the circuit, reset and stop halfway, etc. are converted by the switching operation. Figure, S1 to start timing when the timer is started, then this switch has no effect. S2 is centrally located in..

555 in the use of time-based circuit design from the timer circuit, generally will be 555 monostable circuit is connected, so connected so that the circuit design is simple, re..

555 timer is a combination of analog and digital functions in scale integrated devices. Usually made with bipolar process called 555, with the CMOS process is referred to 7555,..

A precision shown by the LM567 timer circuit MPI826 constructed and where LM567 used as a dual-band oscillator. MP1826 acts as a divider in the circuit, the output signal by di..

As shown for the general multi-function alarm and timing circuitry. The timing of the circuit can range from 5 minutes to 3 hours. Timing components C2, VD1 and VT1 composition..

As shown in FIG MC14541 constituted by a simple timing circuit. The circuit uses IC MC14541 constitute a simple timing circuit. Press the parameter map, the timing for 3 hours,..

As shown in FIG, MP1826 in the circuit as a multi-stage divider. LM567 is the frequency demodulation circuit, the circuit as a dual-band oscillator which generates the desired ..

As shown in Figure 1 hour using a LM122 timer circuit. Start of the circuit, reset and stop halfway, etc. are converted by the switching operation. Figure, S1 to start timing w..

As shown in Figure 4 hours AC timing circuit. In this circuit, BH4024 is 7 serial binary counter/divider 555 time base circuit. AN is timed touch of a button. Each press AN tim..

As shown, the timing circuit due to the installation of the electronic switch by the F1, F2 and VT1 composed of quiescent current can be reduced to 555 l ~ 2 A. When the power ..

By 0.001 F the first half of the coupling capacitor 556 pairs timer output is supplied to the second half of the input given individual delay equal to the sum of the total dela..

Circuit photoelectric switch S1 is gated or luggage room light control switch. A point is in its closed operating voltage is positive. If S2 is closed, regardless of whether or..

Circuit shown in Figure 3-69. It applies to require frequent timing control motor reversing operation of the occasion. Drawing, thyristor Vl, V2 and V7, vs used as a positive c..

Two-phase stepper motor typical application is shown in Figure 5-15 Xin, made up of two pieces UC3717A can form a two-phase permanent magnet or hybrid stepping motor microcomputer control system...

The figure shows that dark tomb electric locks, fti: al: 4046B and XOR f] as the main control circuit, called S emitted pulses and silicon successive pulses built 4 Shaanxi. ..

A typical application example shown, SAA1042 12V stepper drive motivation, phase winding current is taken as 200mA. Choose from the RB Figure 5-10, taking RE = 56kfl. It is connected to the output of ..

PPMC external UChl 5804 shows four-phase stepping motor drive IC is shown moving down. It uses the P-OUT, ccw / cw and HOLD output. Use UCN5804 9 and 10 pin logic level can..

This machine uses FD-CAS-923 1 stepper motor control experiment board with 4-phase step motor to avoid its schematic shown in Figure 4-42a, JK1 cop 40 core flat cable connector, the signal arrangement of EICE51 simulation compatible interfaces can..

An innovative current detection method, eliminating the power loss of the sense resistor in series with the motor, a 4-digit - analog converter (DAC), provides a digital contro..

As it can be seen from the figure, + DC Solid State Relay (SSR) of the input stage is an opto-isolator, when the switch output is high, by inverting driver circuit goes low, so..

Bipolar stepper motor drive circuit is shown, it will use eight transistors to drive two phases. Bipolar drive circuit can drive four-wire or six-wire stepper motor, although t..

Circuit schematic diagram IC1-4069 the Y1, Y2 to form a frequency 76KHZ oscillator, Y3-Y6 isolation after shaping into the IC2 CD4027 dual JK flip-flop consisting of two compon..

Discrete components ultrasonic transmitting circuit T / R-40-16 can emit a series of ultrasonic signal of 40kHz. ..

3 feet from the oscillating pulse output 555 of 40kHz drive T-40-16 work, so that emit ultrasonic signals of 40kHz. Circuit voltage of 9V, operating current 40 ~ 45mA, control distance is more than 8m...

Many brands and Asia ultrasonic remote control switch circuit form, the control device to perform some use of relay; others use thyristors. The use of remote control transmitter puffer type sub..

T-40-16 and 555 ultrasonic transmitter circuit configuration as shown in a, the circuit consists of an ultrasonic transmitter T-40-16 and 555 circuit, adjust the potentiometer RP can change the..

555 ultrasonic constructed transmitter circuit 3 feet from the oscillating pulse output of 555 T-40-16 40kHz drive to work, so that emit ultrasonic signals of 40kHz. Circuit vo..

By a clock with a calendar Ultrasonic Ranging IC SB5027 constitute a circuit diagram of an ultrasonic range finder ..

Circuit consists VTl. ~ VT7 and other components. Since receiving the signal emitted by the transmitter is very weak emblem, the circuit uses multi -stage amplifier, the output..

Circuit consists of an ultrasonic transmitter and T-4 0-16 555 circuit, adjust the potentiometer RP can change the oscillation circuit frequency. 40k 3 feet from the output 555..

Circuit constituted by the US0012 and P ultrasonic interference detection system is shown in Fig. When SEL40k termination high, select 40kHz clock frequency. P can use to compl..

Circuit principle : ultrasonic anti-collision circuit is shown, when the LM1812 circuit by circuit group to control the transmission and reception of LM1812 (LM1812, ie send an..

This circuit uses KA2184 infrared receiver ASIC production infrared remote control dimmer light circuit as shown, wherein the infrared emission from the driving pulse generator NE555 components...

Infrared reflective burglar alarm, infrared detection using reflective components (maximum detection range of up to 12m) to trigger the alarm, when Pirates of the situation is detected, an alarm will sound realistic barking to alert the owner of..

Shown as an infrared receiver circuit. The figure shows that the circuit is mainly composed of an infrared remote control signal switching circuit vri and signal amplification, filtering and rectifying integrated circuits TDA4 ()..

Infrared alarm system is the use of infrared LED emits invisible light, when the light is blocked by the body, namely the police. It consists of an infrared light emitting circuit and reception circuit ..

(1) infrared transmitter circuit of the infrared transmitter circuit shown in Figure 18-la. By transistors VT1, VT2 and RC components and the like more than a flop. Multivibrator works; Kun brother were VT2, VT1 base bias resistors, closing the switch SA plus ..

BISS0001 is a sensor signal processing with higher performance integrated circuits, which together with the pyroelectric infrared sensors and a small amount of external components constitute passive pyroelectric infrared switch. It can automatically..

An application focus infrared heat is radiated by an object while the object of infrared non-contact temperature measurement, since the detection of the measured signal is very..

As shown, the circuit due to the integrated amplifier, so the circuit is simple, small size. TDA4050 IC used here, a weak signal is received by the infrared photodiode VD, firs..

Automatic door control and the market price of finished executing agency generally high, the proposed method will be suitable for homemade use, the components used are easy to ..

BISS0001 is a sensor signal processing integrated circuit with higher performance, it is accompanied pyroelectric infrared sensors and a small amount of external components con..

But here is a new type of infrared using TX05C radio sensor module made of doors and windows burglar alarm. Because it is not visible to the human eye utilizing infrared, wirel..

By BH-SK-I produced non-contact infrared lamp switch circuit shown in Figure 3-42, it is mainly by voice integrated circuits, infrared light-emitting tube and receiving tube, c..

By the time-base integrated circuit 555, the transistor VT and a few external components to form a multivibrator circuit charge and discharge time constant Ti and V, where Ti 0..

By transistors VT1, VT2 and RC components, etc. to form a multivibrator. Multivibrator works: Ra, R4 are VT2, VT1 base bias resistor, closing the switch SA after the power volt..

Tubular Xe lamp power, high brightness, known as the "little sun." Tubular xenon lamp wiring shown in Figure 2-6...

Circuit is shown using 10kHz 3kHz LM565CN constitute the FM demodulation circuit. The V1 and V2 differential demodulation output diagram (b) of the differential amplifier A1 level displacement and amplification, and then by the A2 active LPF filtered....

A circuit diagram of a phase locked loop fast the whole band takes a Am686 latched comparator as voltage controlled oscillator, and the other with a TTL latch coupled to genera..

C- MOSIC4046 PLL having the main function of a maximum operating frequency of iMHz integrated circuit, which is connected to the programmable divider, can constitute the input ..

Circuit is shown using the 4046 PLL FM demodulation circuit device comprising, IF FM demodulation circuit output by the input signal frequency signal. ..

The picture shows the JFET VHF band of super-regenerative receiver circuit, where high discharge tube V1, V2 for the super-regenerative detector tube, IC1 is a low frequency amplifier. Circuit and sensitivity than 1uV, static power consumption less than 10uA...

It shows an FM modulator of a strong, weak signal switching circuit. The circuit ring 3-14 (a) shown in mechanical switches, one for the workers selector switch to choose based on the signal strength. Figure 3-14 (b) shows the use of diode switching control...

Circuit is shown. It includes a full range of vibration sensors, follower, lamp relay control circuit, voice sounding circuit, high-frequency oscillation circuit and the AC rec..

Triac motor drive circuit b Shows the motor drive circuit TRIAC TRIAC has been called solid state relays. Figure (a) shows a circuit configuration diagram (b) shows the connection of the motor coils...

A simple digital circuit is shown can be used to precisely control the AC power supply, the circuit is no digital to analog conversion circuit. In the application, the effectiv..

Adjustment potentiometer RP, the voltage on the load Rfz Uh set value. By RPz real now closed loop control. Open-loop control works, as long as the feedback voltage Uf ground c..

And the section of the circuit is similar, with the solid photoresistor RG fixed resistor Rl also form a voltage divider. Light-emitting diodes LED1, LED2 here doubles as a pow..

As shown for the TRIAC dimmer circuit diagram, working principle is: power, 220V lamp VR4 R19 through C23 charge. Because of two-terminal voltage capacitor is not mutated. char..

Circle S2 is stable automatic light switch, when S2 is open, the entire circuit is Subsection II SCR stepless presentation dimmer, simply omit the high-frequency filter circuit..

Closed lights switch S, 220V AC via RP1, RP2 R and the capacitor C2 is charged when the voltage across C2 reaches diac breakover voltage of VD, VD and triac vs sequentially tur..

A commitment by the MIC5158 to control tasks, a plurality of external N-channel MOSFET parallel output, resulting in high current or high power output linear regulator circuit ..

And 3 gn same basic circuit, and the second stage is a differential output of the power MOSFET, 2SJ77, a current mirror circuit uses 2SK214. While the operating current is only..

MAX2740 is a complete GPS receiver down converter chip, the complete output from the antenna to the input of the digital signal processing. MAX2740 receiver channel contains LNA, down 2 converter, a variable gain amplifier and a fixed gain amplifier...

Range precision voltmeter electrical schematic in Figure (a) below. Amplifier circuit and a number of high-precision components, which greatly improves the performance range of the voltmeter...

Intelligent digital voltmeter circuit by the HI7159A 8031 and other components as shown in FIG. The internal circuit with successive cumulative integrator, digital zero, low noise BIMOS other advanced technologies. In 5 1/2 bit mode of the maximum count....

As shown in FIG DC millivoltmeter a three and a half digital display, with high accuracy, performance, stability and ease of use. Its measurement range is 0 ~ 1.999mV, measurem..

Analyzing the three-phase i [l + Jl search winding its head and tail of many therapies such as the use + hair bundle judge committed two apostrophes. Simple and easy to i safel..

As can be seen from the three-phase voltage waveform diagram [Figure 2- 76 (a)] When one of the phases voltage from positive to negative over the zero point, followed by a phas..

As shown by FIG MAX4100/4101 unit gain buffer circuit constituted. This circuit uses a small resistor (24 ) placed in the feedback loop amplifier constituting a unity gain buff..

As shown by MAX4102/4103 unity gain buffer circuit shown in FIG. This circuit uses a small resistor (24 ) placed in the feedback loop amplifier constituting a unity gain buffer..

As shown for the isolation buffer circuit capacitive load. Usually when an external op amp for capacitive load, will seriously affect the stability of the circuit, while its dy..

As shown in FIG OPA111 constituted by the input buffer leakage current measuring circuit. D1, D2 of the transistor 2N3904, which will short the base and collector contact (open..

As shown in FIG constituted by OPA340 INA321/322 output buffer circuit. INA321/322 optimum load impedance 10k or more. When the load impedance decreases, the output current wil..

Back radiation small buffer amplifier It shows an inverse radiation small buffer amplifier. The circuit consists of three series-connected transistors of the buffer amplifier c..

Buffer amplifier Shown in use as a transistor emitter follower buffer amplifier for applications that require high input impedance of the amplifier. Complementary push-pull cir..

Circuit shown in Figure 3-86. The line utilization time relay to control two motors, one of the first than the other after starting stall. Adjust the time relay KTi, two electr..

Circuit shown in Figure 3-89. After starting the motor Mi can guarantee, it allowed the other two to start the motor. Shutdown, power motivation Mz, can first stop, but as long..