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Gain-Controlled Op Amp – Circuit Schematic
Gain-Controlled Op Amp
The gain controller uses a 4066 quad bilateral switch to electronically select a feedback resistor for the 741 op am...
Op Amp Regulator – Circuit Schematic
Op Amp Regulator
This op amp offers a straightforward method of developing a single-polarity stable voltage source (see the figure). TVansi...
Precision Full-Wave Rectifier – Circuit Schematic
Precision Full-Wave Rectifier
Using two op amps, this circuit produces a full-wave rectified version of the input signal. Op amp IC1 invert...
Variable-Voltage Reference Source – Circuit Schematic
Variable-Voltage Reference Source
The noninvertiiig terminal of the op amp is grounded, and the circuit uses the voltage at the inverting t...
Continuity Checker – Circuit Schematic
Continuity Checker
Ul is an op amp used as a comparator. When the test probes are shorted together, resistors R1 and R2 bias the noninverti...
Simple Absolute Value Circuit – Circuit Schematic
Simple Absolute Value Circuit
When an input voltage is positive, the output of ICA is negative and diode D does not conduct; hence the outp...
One-Zener Precise Limiter – Circuit Schematic
One-Zener Precise Limiter
A limiter circuit that requires matched zener diodes can instead use one zener with a full-wave diode bridge. The...
Instrumentation Amplifier – Circuit Schematic
Instrumentation Amplifier
In a single difference amplifier configuration, the AM-427 exhibits excellent common-mode rejection and spot nois...
Low-Drift/Low-Noise Dc Amplifier – Circuit Schematic
Low-Drift/Low-Noise Dc Amplifier
Figure 39-2"s circuit combines a low-noise op amp, IC1, with a chopper-based carrier-modulation scheme to ...
Potentiometer-Position V/F Converter – Circuit Schematic
Potentiometer-Position V/F Converter
In this application, an AD652IC is used in a synchronized V/F converter that derives its input from th...
Simple Rumble Filter – Circuit Schematic
Simple Rumble Filter
This circuit is a two-section active HP filter using an LM387, with a cutoff below 50 Hz at 12-dB per octave. It will ...
Antialiasing And Sync-Compensation Filter – Circuit Schematic
Antialiasing And Sync-Compensation Filter
Two dual-biquad filter chips and some external components form a multipurpose filter to reconstru...
Fast-Response (Settling) Low-Pass Filter – Circuit Schematic
Fast-Response (Settling) Low-Pass Filter
By introducing an extra transmission zero to the stopband of a low-pass filter, a sharp roll-off c...
Op Amp Power Driver – Circuit Schematic
Op Amp Power Driver
Frequently, the output current of an operational amplifier is inadequate for the application as, for instance, when a s...
Peak Detector – Circuit Schematic
Peak Detector
An analog signal requires about 100 ns to propagate through the HA-5320. For time-varying signals, this assures a voltage dif...
Undervoltage Detector – Circuit Schematic
Undervoltage Detector
The output goes high when the supply falls below a value determined by zener diode Dl. If Dl is a 5.6-V zener, the op...
Peak Detector – Circuit Schematic
Peak Detector
A 0-to-5 V input drives the negative input of LM392 comparator if reset (pin 12) if DC4060BE is pulled high then low, all out...
Sine-Wave/Square-Wave Converter – Circuit Schematic
Sine-Wave/Square-Wave Converter
An op amp used as a comparator produces a 10-V p-p square-wave output with 100-mV input, to 15 kHz. Adjust ...
Universal Compander – Circuit Schematic
Universal Compander
Signetics" type NE575 compander IC is intended primarily for use with battery power supplies of 3 to 7 V (max. 8 V). It...
Precision-Increasing Buffer – Circuit Schematic
Precision-Increasing Buffer
Adding an unity-gain buffer to your analog circuit can increase its precision. For example, by itself, the op a...