Peak detect and hold
If the voltage at the input exceeds the voltage on the capacitor, then the output of the 741 goes positive, the diode conducts, and the capacitor is charged up ...
100K megohm DC probe
A 741 op amp is used with 100% ac and dc feedback to provide a typical input impedance of 1011 ohm and unity gain. To avoid hum and rf pickup the input leads sh...
Oscilloscope converter
The monolithic quad operational amplifier provides an inexpensive way to increase display capability of a standard oscilloscope. Binary inputs drive the IC op a...
Inverse scaler
If a DAC is operated in the feedback loop of an operational amplifier, then the amplifier gain is inversely proportional to the input digital number or code to ...
Simulated inductor
With a constant current excitation, the voltage dropped across an inductance in-(in creases with frequency. Thus, an active device whose output increases with f...
X10 operational amplifier
Amplifier is 3 dB down at 100kHz...
X100 operational amplifier
Amplifier has gain-bandwidth product of 20 MHz...
High gain differential instrumentation amplifier
This circuit includes input guarding, cable bootstrapping, and bias current compensation...
Instrumentation amplifier
Three-amplifier circuit consumes only 135 /tW of power from a ±1 V power supply. With a gain of 101, the instrumentation amplifier is ideal in sensor interfa...
Instrumentation amplifier
Instrumentation amplifiers (differential amplifiers) are specifically designed to extract and amplify small differential signals from much larger common mode vo...
DC-10Khz frequency-voltage converter
The converter generates an output voltage which is linearly proportional to the input frequency waveform. Each zero crossing at the comparator"s input causes a ...
Tunable active filter
The high-pass and low-pass outputs cov- output. The potentiometers must have a re-ering the range of 300 Hz to 3000 Hz have been verse log taper...
Biquad filter
The biquad filter, while appearing very similar to the state-variable filter, has a bandwidth that is fixed regardless of center frequency...
Three amplifier active filter
The active filter is a state variable filter with bandpass, high-pass and low-pass outputs...
Low-pass filter
This nonlinear, passive filter circuit rejects ripple (or unwanted but fairly steady-voltage) without appreciably affecting the rise time of a signal. The circu...
Variable bandwidth bandpass active filter
This circuit has adjustable bandwidth with values for a center frequency of about 800 Hz...
Rejection filter
This narrowband filter using the 741 operational amplifier can provide up to 60 dB of rejection. With resistors equal to 100 K and capacitors equal to 320 pF, t...
High q notch filter
A shows a twin-T network connected to an LM102 to form a high Q, 60 Hz notch filter. The junction of R3 and C3, which is normally connected to ground, is bootst...
Selectable bandwidth notch filter
This notch filter, which operates at up to jected...
Digitaxly tuned low power active filter
Constant gain, constant Q, variable frequency filter which provides simultaneous low-pass, bandpass, and high-pass outputs...