Window-detector circuit | Next Electronics

The non-inverting amplifier has a gain of R2/R3 (1 in this case) and produces a voltage of V during a positive excursion of Vin with respect to ground. The inverting amplifier accommodates the negative excursions of V; its gain is...

op amp based sound detector circuit

This circuit is designed for sound detection and generates an output signal when sound is detected. This output can trigger another circuit that activates an alarm, making it suitable for security applications. The circuit employs a condenser microphone to capture...

room noise detector

This circuit is designed to indicate, via a flashing LED, when room noise exceeds a predetermined threshold, which can be set to one of three fixed levels: 50, 70, or 85 dB. Two operational amplifiers (op-amps) are utilized to amplify...

High Gbw Op-Amp Circuit

A composite amplifier can be constructed that offers high gain, wide bandwidth, and good DC accuracy by cascading the sections of a dual video amplifier and incorporating two suitable phase compensation components. The operational amplifier drives a 150-ohm load and...

Op-Amp Circuit: Difference Amplifier

This circuit is a difference amplifier. It functions as an inverting amplifier that enables the subtraction of two voltages, effectively performing a summation. The difference amplifier is a fundamental circuit configuration in analog electronics, primarily used for amplifying the difference between...

Dc-gain-controlled-video-amplifier

This amplifier utilizes a cascaded operational amplifier (op amp) integrator and a transistor buffer, Q1, to drive the gain control element. With a minor modification, the HA-5190/5195 stage is configured as a conventional non-inverting op amp and includes input and...

Multiple-feedback bandpass filter

The operational amplifier (op amp) is configured in inverting mode. Resistor R3 connects the output to the inverting input, establishing the gain and the current through the frequency-determining capacitor, C1. Capacitor C2 provides feedback from the output to the junction...

Circuit examples

Input J4 features an offset function that is activated only when no plug is inserted into J4, as the switching contact of J4 connects to the positive supply voltage through the protection resistor R8. The inverting sum of all inputs...

op amp Crystal Oscillator with OP AMP or Oscillator circuit built with Crystal and Op Amp

Create an oscillator circuit using an operational amplifier and a 7.68 MHz crystal. The design should be similar to the schematic provided below, but specifically tailored for a 7.68 MHz crystal. The available components include the crystal, various capacitors, resistors,...