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Capacitor in parallel with resistor on xoscope amplifier schematic – Circuit Schematic
Capacitor in parallel with resistor on xoscope amplifier schematic
For C3, the 100pF across R2. The circuit does exactly the same thing, once again with no explanation. Apparently the utility ought to be obvious, but I`m new to...
op amp How does this OP-AMP offset voltage measuring circuit work – Circuit Schematic
op amp How does this OP-AMP offset voltage measuring circuit work
I`ve built this circuit with two LT1001 s and the output of the OP-AMP saturates to +5V. I used +5V and GND for the supplies. In the page, it says that if +1V i...
op amp Reducing noise in audio circuit (optical pickup + op amp) – Circuit Schematic
op amp Reducing noise in audio circuit (optical pickup + op amp)
Except that I`ve added a passive high-pass filter after the output of the op-amp, to eliminate DC (since I am using 0V and +12V as my V- and V+, respectively). ...
op amp Getting PWM with an astable multivibrator (square wave generator) – Circuit Schematic
op amp Getting PWM with an astable multivibrator (square wave generator)
To create a square-wave generator but I would like to modify it by getting an output that runs from 0 to +5V, as well as changing the signal so that I can chang...
Rms Converter Preamplifier and Scaling – Circuit Schematic
Rms Converter Preamplifier and Scaling
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Integrator amplifier – Circuit Schematic
Integrator amplifier
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Signal conditioning circuits – Circuit Schematic
Signal conditioning circuits
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Voltage-Controlled Current Source Uses Two Op Amps – Circuit Schematic
Voltage-Controlled Current Source Uses Two Op Amps
Author Mazi Hosseini describes a simple, low-cost, voltage-controlled current source using two op amps that provides a good range of current and maximum load...
Op Amp And Two JFETs Form A Voltage-Controlled Amplifier – Circuit Schematic
Op Amp And Two JFETs Form A Voltage-Controlled Amplifier
A simple linear voltage-controlled amplifier can be constructed with one op amp and two JFETs (see the figure). The amplifier can achieve an 80-dB dynamic contr...
Low-Cost Quad Op Amp Drives RF Modulator – Circuit Schematic
Low-Cost Quad Op Amp Drives RF Modulator
The video circuit illustrated in Figure 1 combines an audio-subcarrier notch filter and group-delay equalization as required by the ITU-470 standard. It also in...
Improved Photodiode Pre-Amp Uses Current-Feedback Amplifier – Circuit Schematic
Improved Photodiode Pre-Amp Uses Current-Feedback Amplifier
This design idea overcomes a significant problem with using photodiodes in fast applications like barcode scanners, CD-ROMs, and DVDs--high output capacitance o...
Did You Buffer The Buffered Buffer – Circuit Schematic
Did You Buffer The Buffered Buffer
Cypress` Dave Van Ess cautions circuit designers about the sloppy overuse of op amps with examples and circuit theory...
op amp summer as a digital to analog converter dac – Circuit Schematic
op amp summer as a digital to analog converter dac
The circuit shown in Figure 1 is a simple 4-bit digital-to-analog converter. It is actually just a simple op amp summer circuit, i. e. , an operational amplifie...
op amp square wave generator – Circuit Schematic
op amp square wave generator
This is a square wave generator circuit. The main component of this circuit is the 741, a general-purpose operational amplifier. This circuit employs a single p...
op amp monostable multivibrator – Circuit Schematic
op amp monostable multivibrator
This is a monostable multivibrator circuit that employs a single op amp. The main component of this circuit is the 741, a general-purpose operational amplifier....
lm387 dynamic microphone preamplifier – Circuit Schematic
lm387 dynamic microphone preamplifier
A dynamic microphone preamplifier can be realized using LM387 dual operational amplifier integrated circuit. Input impedance corresponds to 47k, it depends almo...
Sample And Hold Using CMOS – Circuit Schematic
Sample And Hold Using CMOS
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CMOS Based VCA – Circuit Schematic
CMOS Based VCA
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Karplus Strong Opamp Circuit – Circuit Schematic
Karplus Strong Opamp Circuit
It`s basically just an all-pass filter with two components added: a capacitor and a resistor. And it`s making percussion sounds! wow! See the attachments below ...
Issues with the OPA548 current limiting – Circuit Schematic
Issues with the OPA548 current limiting
In order to eliminate noise, I`ve used a 100uF capacitor and a 100nF bypass capacitor across the supply and two 10nF capacitors in parallel with the resistors R...