Advertisement
AUDIO OSCILLATOR – Circuit Schematic
AUDIO OSCILLATOR
A Wien bridge oscillator produces sine waves with very low distortion level. The Wien bridge oscillator produces zero phase shift at only one frequency (f=1/2 R...
7400 SIREN – Circuit Schematic
7400 SIREN
Two NAND gates are used for the oscillator, and two as the control. If the two-tone speed needs to be altered, the 220 F capacitors can be changed (larger for s...
160 METER VFO – Circuit Schematic
160 METER VFO
Standard Colpitts oscillator Q1 with emitter-follower Q2 gives dependability and adequate isolation from later stages Zener regulation provides stability even w...
10 MHz VFO – Circuit Schematic
10 MHz VFO
Values shown for high-stability variable-frequency oscillator give operation in 10-MHz range. Stable supply voltage is essential. Use silver mica capacitors in ...
QUADRATURE OSCILLATOR – Circuit Schematic
QUADRATURE OSCILLATOR
Addition of diode limiter and positive feedback resistor to UAF41 universal active filtrer gives precision quadrature oseillator. -Y. J. Wong, Design a Low Co...
SINE WAVE TO SQUARE WAVE CONVERTER – Circuit Schematic
SINE WAVE TO SQUARE WAVE CONVERTER
This circuit tums a sine wave into a square wave. It is comprised of a single 2-input NAND Schmitt trigger that`s conftgured as an inverter with a trigger level...
20 kHz ASTABLE – Circuit Schematic
20 kHz ASTABLE
Single-capacitor circuit is reIiable over wide range of temperatures. voltages. and transistor gains. Frequency varies only by 0. 05% for supply voltage changes...
MORSE PRACTICE OSCILLATOR – Circuit Schematic
MORSE PRACTICE OSCILLATOR
...
QRP SIDETONE GENERATOR CODE PRACTICE OSCILLATOR – Circuit Schematic
QRP SIDETONE GENERATOR CODE PRACTICE OSCILLATOR
For use with low-power transmitters with a positive keying voltage. Q1/Q2/Q3 form a switching amplifier. When the key is pressed, the collector of Q3 goes to gr...
SIMPLE ULTRASONIC GENERATOR – Circuit Schematic
SIMPLE ULTRASONIC GENERATOR
This basic ultrasonic generator can be built easily and quickly. An NE555 drives a speaker. The frequency range is 12 to 50 kHz. SPKRI is a piezo tweeter, etc. ...
LC AUDIO OSCILLATOR – Circuit Schematic
LC AUDIO OSCILLATOR
...
IC rprecision waveform generator with sweep and frequency modulation – Circuit Schematic
IC rprecision waveform generator with sweep and frequency modulation
These circuits are similar to that of Fig. 5-47, except that the circuits provide for FM or sweep modulation. Use circuit 5-50A for FM (small deviations, about ...
Voltage controlled sine wave oscillator – Circuit Schematic
Voltage controlled sine wave oscillator
For a 0- to 10-V input, this circuit produces sine-wave outputs of 1 Hz to 20 kHz, with better than 0. 2% linearity. Distortion is about 0. 4% and the sine-wave...
WIDE RANGE STAIRCASE GENERATOR – Circuit Schematic
WIDE RANGE STAIRCASE GENERATOR
Has high input impedance und low output impedance, to reduce droop in output voltage between pulses. Staircase is generated by pump D2-C2, which is boostrapped ...
SIMPLE TLO82 VCO – Circuit Schematic
SIMPLE TLO82 VCO
This circuit uses a dual operational amplifier (TL082) to form a voltage-controlled oscillator (VCO). With the component values shown, the output-frequency rang...
Sine wave output V F converter – Circuit Schematic
Sine wave output V F converter
Most of the V/F converters in this chapter produce pulse or square-wave outputs. Many applications (such as audio, filter, or automatic-equipment testing) requi...
VOLTAGE TUNED CLAPP OSCILLATOR – Circuit Schematic
VOLTAGE TUNED CLAPP OSCILLATOR
This voltage-tuned Clapp oscillator uses a varactor diode to set its operating frequency. D1 is an NTE614. L1 is about 7/ ’ (MHz) microhenries. With the circu...
ADJUSTABLE SIREN – Circuit Schematic
ADJUSTABLE SIREN
Tone is made adjustable by using multiposition switch to change capacitors in oscillator circuit. Speed (rate of change in frequency) of siren is adjusted with ...
SPARK GAP OSCILLATOR – Circuit Schematic
SPARK GAP OSCILLATOR
A high-voltage current-limiting transformer (T1) supplies power to the basic LC tuned circuit. As C1 charges to near the transformer`s maximum output voltage, t...
CENTER TAPPED TRANSFORMER AUDIO OSCILLATOR – Circuit Schematic
CENTER TAPPED TRANSFORMER AUDIO OSCILLATOR
The oscillator circuit uses a center-tapped transistor output transformer to serve as a load for the collector of Q1, supply a feedback signal for the base, and...