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Ensemble II VHF RX opamp – Circuit Schematic
Ensemble II VHF RX opamp
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Robots Bandpass Filter Calculator – Circuit Schematic
Robots Bandpass Filter Calculator
They are op-amp based filters and are most useful in the audio frequency range. These parts calculators are based on formulas and tables from the book " Electro...
Broskie auto-bias circuit – Circuit Schematic
Broskie auto-bias circuit
Considering that I had complained of a schematic typo from Siliconix, it is doubly embarrassing that that April 29`s blog held a few schematic typos of my own c...
PRECISION RECTIFIER – Circuit Schematic
PRECISION RECTIFIER
Used in digital voltmeters to convert AC waveform to full-waverectified DC equivalent. First 3130 opamp is used as polarity separator, with negative-going signa...
OPTICALLY COUPLED V F – Circuit Schematic
OPTICALLY COUPLED V F
Input voltage range of 0-10 V is converted to proportional frequency at output of optoisolator with high linearitv bv RM4151 converter used in combination with ...
AMPLITUDE MODULATOR 1 – Circuit Schematic
AMPLITUDE MODULATOR 1
Uses controlled variation of amplifier bias current IABC in CA3080A variable opamp to obtain effective gain control of signal. Variations in amplitude of modula...
PHOTODIODE CURRENT TO VOLTAGE CONVERTER – Circuit Schematic
PHOTODIODE CURRENT TO VOLTAGE CONVERTER
The circuit uses three CA3130 BiMOS op amps in an application sensitive to sub-picoampere input currents. The circuit provides a ground-referenced output voltag...
SINE WAVE TO SQUARE WAVE CONVERTER – Circuit Schematic
SINE WAVE TO SQUARE WAVE CONVERTER
The sine input is ac coupled by capacitor C; R1 and R2 bias the input midway between Vn and Vp, the input threshold voltages, to provide a square wave at the ou...
Basic current to voltage converter – Circuit Schematic
Basic current to voltage converter
With this basic circuit, the input current is fed directly into the summing node (pin 2) and the op-amp output changes to extract the same current from the summ...
Operational Amplifiers circuits – Circuit Schematic
Operational Amplifiers circuits
The Wien-Bridge oscillator fulfills these requirements because there is a low pass filter, a high pass filter and a 180 deg. phase shift from the feedback netwo...
Operational amplifier – Circuit Schematic
Operational amplifier
An operational amplifier, which is often called an op-amp, is a DC - coupled high- gain electronic voltage amplifier with a differential input and, usually, a s...
Charge amplifier – Circuit Schematic
Charge amplifier
A charge amplifier is an amplifier whose equivalent input impedance is a capacitive reactance that is very high at low frequencies. Thus contrary to what its na...
Averager and Peak Hold/Extender Signal Conditioner – Circuit Schematic
Averager and Peak Hold/Extender Signal Conditioner
A signal averager circuit can be formed by an amplifier and active signal rectifier, which is implemented using two operational amplifiers in this circuit. The....
Programmable Capacitance Multiplier with DAC – Circuit Schematic
Programmable Capacitance Multiplier with DAC
Capacitance multiplier simulate high capacitance capacitor for analog signal signal processing. By using DAC (Digital-to-Analog Converter), we can simulate.....
Bi-Stable Multivibrator (RS Flip-FLop) with Op-Amp – Circuit Schematic
Bi-Stable Multivibrator (RS Flip-FLop) with Op-Amp
This bi-stable circuit uses an op-amp, acts similar with RS flip-flop. Bi-stable circuit is a circuit with two stable states, low and remain low until set is.....
Direct Coupled On/Off Touch Switch – Circuit Schematic
Direct Coupled On/Off Touch Switch
The following touch switch circuit uses a CA3240 dual BiMOS op amp to sense small currents flowing between the contact points on a touch plate. Since this.....
Low-Cost Logarithmic Converter Using Opamp and Transistor – Circuit Schematic
Low-Cost Logarithmic Converter Using Opamp and Transistor
This low-cost logarithmic converter is built using op-amp and transistor. This circuit uses a Motorola MC1539G op-amp which is connected to PNP transistor. To.....
Two Op-Amps 60 Hz Notch Filter – Circuit Schematic
Two Op-Amps 60 Hz Notch Filter
Notch filter is a filter that remove a certain B. Ideally a notch filter will remove only single point of frequency  component, but practically it will remove....
Current Mmode 20MHz Noninverting Amplifier – Circuit Schematic
Current Mmode 20MHz Noninverting Amplifier
Current mode amplifier has the benefit of higher frequency operation, and LM359 comes as operational amplifier with this type op amplifier. Current mode.....
LM359 1MHz Balanced Line Driver – Circuit Schematic
LM359 1MHz Balanced Line Driver
Balanced signal consist of two lines that have opposite phases, and should be received with differential input receiver. Balanced signal is employed in many.....