Op Amplifiers circuits

Op Amplifiers

Operational amplifier circuits and applications.


A FET Amplifier
FET amplifier using a discrete FET pair in conjunction with a monolithic circuit.
Adjustable Voltage References
Adjustable voltage reference circuits (Positive and Negative).
Computing Circuits
A circuit which performs both multiplication and division in this fashion.
Differentiator
Differentiator and Practical Differentiator.
Integrator
This circuit is essentially a low-pass filter with a frequency response decreasing at 6 dB per octave.
Level Shifting Amplifier
Level-Shifting Amplifiers: Standard Differential Amplifier and Level-Isolation Amplifier.
Low Drift Sample and Hold circuit
A sample-and-hold circuit which combines the low input current of FET’s with the low offset voltage of monolithic amplifiers.
More Output Current Swing
High Current Output Buffer with a pair of complementary transistors.
Non-Inverting Amplifier
The Non-Inverting Amplifier, a high input impedance non-inverting circuit.
Nonlinear Operational Amplifier
Nonlinear Operational Amplifier with temperature-compensated breakpoints
Operational-Amplifier Oscillator
The free-running multivibrator shown in is an excellent example of an application where one does not normally consider using an Op Amp.
Photocell Amplifiers
Amplifiers for photoconductive, photodiode and photovoltaic cells.
Positive Peak Detector with Buffered Output
The peak detector is similar in many respects to the sample-and-hold circuit.
Precision Current Source
Precision Current Sink and Precision Current Source.
Programmable Bench Power Supply
Programmable positive and negative power supply.
Root Extractor
Taking the root of a number using log converters is a fairly simple matter. All that is needed is to take the log of a voltage, divide it by, say 1⁄2 for the square root, and then take the antilog.
Servo Preamplifier
Saturating Servo Preamplifier with Rate Feedback
Simple Low-pass Filter
This circuit has a 6 dB per octave roll-off after a closed-loop 3 dB point.
Sine Wave Oscillator
An amplitude-stabilized sine-wave oscillator. This circuit provides high purity sine-wave output down to low frequencies with minimum circuit complexity.
Summing Amplifier
The summing amplifier, a special case of the inverting amplifier.
The Analog Multiplier
A simple embodiment of the analog multiplier.
The Current-to-Voltage Converter
The current-to-voltage transducer.
The Difference Amplifier
The difference amplifier is the complement of the summing amplifier and allows the subtraction of two voltages or, as a special case, the cancellation of a signal common to the two inputs.
The Full-Wave Rectifier and Averaging Filter
The circuit is the heart of an average reading, rms calibrated AC voltmeter.
The Inverting Amplifier
Inverting Amplifier is the basic operational amplifier circuit.
The Unity-Gain Buffer
The circuit gives the highest input impedance of any operational amplifier circuit.
Tracking Regulated Power Supply
This supply is very suitable for powering an operational amplifier system since positive and negative voltages track.
Triangle-Wave Generator
This circuit provides a variable frequency triangular wave whose amplitude is independent of frequency.
Voltage Comparators
Comparator for driving DTL and TTL integrated circuits, Comparator and Lamp Driver.

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