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1 MHz oscillator using the MC1553 video amplifier – Circuit Schematic
1 MHz oscillator using the MC1553 video amplifier
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RE POWERED SIDETONE OSCILLATOR – Circuit Schematic
RE POWERED SIDETONE OSCILLATOR
A sidetone oscillator is a special audio oscillator that is turned on and off with the transmitter. The oscillator is rf-driven and bat-tery operated. It uses a...
WIEN BRIDGE OSCILLATOR CIRCUIT – Circuit Schematic
WIEN BRIDGE OSCILLATOR CIRCUIT
A 741 op amp is connected to a Wien-bridge, audio-sine-wave oscillator configuration, with C1, C2, R1, and R2 determining the circuit`s operating frequency. Wit...
THREE FREQUENCY AUDIO OSCILLATOR – Circuit Schematic
THREE FREQUENCY AUDIO OSCILLATOR
The full circuit diagram for the audio sine-wave generator is shown. Resistors R1 and R2 bias the noninverting (pin 3) input of IC1, and their parallel resistan...
BRIDGED T AUDIO OSCILLATOR – Circuit Schematic
BRIDGED T AUDIO OSCILLATOR
Incorporates heavy degenerative feedback in which small lamp is nonlinear compensating resistance. Provides constant output frequency and voltage for any supply...
Astable Multivibrator – Circuit Schematic
Astable Multivibrator
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Crystal oscillators – Circuit Schematic
Crystal oscillators
Crystal oscillators are those in which a specially-cut crystal controls the frequency. CRYSTAL-CONTROLLED OSCILLATORS are the standard means used for maintainin...
Colpitts oscillator – Circuit Schematic
Colpitts oscillator
Both the Armstrong and the Hartley oscillators have a tendency to be unstable in frequency because of junction capacitance. In comparison, the COLPITTS OSCILLAT...
Common-base Colpitts oscillator circuit – Circuit Schematic
Common-base Colpitts oscillator circuit
A common-base Colpitts oscillator using a pnp transistor as the amplifying device. Notice in this version of the Colpitts oscillator that regenerative feedback ...
Tuned-base Armstrong oscillator – Circuit Schematic
Tuned-base Armstrong oscillator
The circuit in view (D) has all three requirements for an oscillator: (1) amplification, (2) a frequency-determining device, and (3) regenerative feedback. The ...
TUNED-COLLECTOR ARMSTRONG OSCILLATOR – Circuit Schematic
TUNED-COLLECTOR ARMSTRONG OSCILLATOR
The dc path is from the negative side (ground) of VCC through RE, Q1, T1, and back to the positive side of VCC. The figure clearly illustrates that both the ac ...
XR-8038 precision frequency generator – Circuit Schematic
XR-8038 precision frequency generator
The purpose of this project is to visually communicate the effects that frequencies have with each other. By expressing these frequencies into mirrors and magne...
Voltage Controlled Duty Cycle Sawtooth Circuit – Circuit Schematic
Voltage Controlled Duty Cycle Sawtooth Circuit
There was a discussion on synth-diy a while ago about the problems of building a voltage controlled oscillator with a sawtooth wave output whose duty cycle (the...
Single-Supply Wien Bridge Oscillator – Circuit Schematic
Single-Supply Wien Bridge Oscillator
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Twin-T Audio Sine Wave Oscillator – Circuit Schematic
Twin-T Audio Sine Wave Oscillator
The circuit illustrated produces a clean sine wave signal ideal for audio testing, or wherever a good-quality sine voltage source is required. It uses one integ...
Echo Tone Oscillator – Circuit Schematic
Echo Tone Oscillator
This simple circuit amplitude-modulates a single tone in such a manner to approximate the echo effect one might obtain, for instance, with sonar apparatus. Any ...
Voltage-controlled oscillator – Circuit Schematic
Voltage-controlled oscillator
A voltage-controlled oscillator or VCO is an electronic oscillator designed to be controlled in oscillation frequency by a voltage input. The frequency of oscil...
RC oscillator – Circuit Schematic
RC oscillator
Linear electronic oscillator circuits, which generate a sinusoidal output signal, are composed of an amplifier and a frequency selective element,a filter. An os...
Colpitts oscillator – Circuit Schematic
Colpitts oscillator
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a simple Astable Multivibrator with the help of a circuit diagram – Circuit Schematic
a simple Astable Multivibrator with the help of a circuit diagram
An Astable Multivibrator is a switching circuit which switches its output on and off for a designed time period. This article also describes about its working. ...