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Noninverted Unity-Gain Amplifier Circuit – Circuit Schematic
Noninverted Unity-Gain Amplifier Circuit
An op amp can be used as a unity gain amplifier by connecting its output to its inverting input as shown....
Inverting Summing Amplifier Circuit – Circuit Schematic
Inverting Summing Amplifier Circuit
The output of Ul is the sum of Vv and multiplied by Rx/Rv RJRV and respectively. Rlj R2, R3 are selected as required for individual gains....
Voltage Comparators – Circuit Schematic
Voltage Comparators
These two comparators are over- and under-voltage comparators. In Fig. 104-5(a), if Vm exceeds the reference voltage, t...
Window Comparators – Circuit Schematic
Window Comparators
In Fig. 104-3(a), when Vin is between reference voltages Vi and Vu, output Vout goes low. If Vin> Vl, IC2 produces a low...
Window Generator – Circuit Schematic
Window Generator
This window generator uses a single LM324 op amp and features two adjustable set points. When the two comparators formed b...
Low-Cost Window Comparator – Circuit Schematic
Low-Cost Window Comparator
This circuit outputs a TTL-compatible - pulse whenever the signal falls within the limits set by potentiometers ...
Capacitor Allows Higher Slew Rates – Circuit Schematic
Capacitor Allows Higher Slew Rates
In this circuit, a Burr-Brown op amp supplies a slew rate of 135 V/. The addition of C2 charges the high...
Full-Wave Rectifier (To 10 Mhz) – Circuit Schematic
Full-Wave Rectifier (To 10 Mhz)
Using two CA3450 op amps and a CA3227 transistor array, this circuit will accurately full-wave rectify sign...
Glitch-Free Clipper – Circuit Schematic
Glitch-Free Clipper
Adding a simple clamping circuit to a Harris 2620 high-speed op amp produces a glitch-free amplifier/ clipper. The op a...
Voltage-Controlled Current Sink – Circuit Schematic
Voltage-Controlled Current Sink
This circuit widens the linear frequency span of an HC4046 from one decade to nearly three decades. An LM35...
On/Off Touch Switch – Circuit Schematic
On/Off Touch Switch
This circuit uses a CA3240 dual BiMOS op amp to sense small currents flowing between the contact points on a touch plat...
Transistor Turns Op Amp On Or Off – Circuit Schematic
Transistor Turns Op Amp On Or Off
When transistor Q1 is switched off, the circuit behaves as a voltage follower. By applying a positive vol...
Two CA3100 Wideband Operational Amplifiers – Circuit Schematic
Two CA3100 Wideband Operational Amplifiers
These circuits are useful for video applications to 10 MHz. The 3.3-pF capacitors are compensati...
Positive Pulse Pulse Stretcher – Circuit Schematic
Positive Pulse Pulse Stretcher
A simple pulse stretcher built with two sections of an op amp uses voltage follower U1A to drive Dl and C2. ...
Voltage-Programmable Current Source – Circuit Schematic
Voltage-Programmable Current Source
This, circuit is a programmable current source in which op amp LT1102 (Linear Technology Corp.) is used...
Bootstrapped Amp Current Source – Circuit Schematic
Bootstrapped Amp Current Source
This circuit responds to the difference between Vj and V2. Rq on sets gain. Resistors XR2 and (1 -X) R2 pro...
Programmable Inverter/Rectifier – Circuit Schematic
Programmable Inverter/Rectifier
The op amp is alternately an inverter or buffer, under control of the switch polarity. As a buffer, the gai...
Make Lm324 Op Amp Swing Rail-To-Rail – Circuit Schematic
Make Lm324 Op Amp Swing Rail-To-Rail
By using two CMOS inverters, the output for an LM324 op amp can be increased from 3.5 Vpp to 4.9 Vpp. ...
Compound Op Amp Vco Driver – Circuit Schematic
Compound Op Amp Vco Driver
This circuit produces 5- to 25-V output to drive a VCO from a standard ± 15-V supply system. R7 and CI supply fr...
Bidirectional Compound Op Amp – Circuit Schematic
Bidirectional Compound Op Amp
Using two transistors (Ql and Q2), a bidirectional op amp can source or sink up to 50 mA. Dl and D2 provide b...