Crystal Oscillator
Crystal oscillator, especially the low frequency one, can be easily implemented using op-amp as the amplifier. Here is the schematic diagram of such circuit: [Source: National Semiconductor Application Note]
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10 Hz to 10 Khz Voltage Controlled Oscillator
Voltage-controlled oscillator (VCO) is an oscillator that its frequency is controlled using a voltage signal. The VCO described here provide both triangular and square wave output. The control voltage can be varied between 5 mV to 5 V, to produce oscillation frequency from 10 Hz to 10 KHz. Here is the schematic diagram of the circuit: [Source: National Semiconductor Application […]
Read more100 kHz Free Running Multivibrator
This free running oscillator employs LM111 comparator. The output of this oscillator is square wave. You can use this square wave oscillator for general purpose. Here is the schematic diagram of the circuit: [Source: National Semiconductor Application Note]
Read more555 IC for Square Wave Tone Burst Generator
Square wave tone bursts is provided by depressing the pushbutton. It’s duration depends on the duration for which the voltage at Pin 4 exceeds a threshold. Astable action of the timer IC is caused by components R1, R2, and C1. Here’s the circuit diagram: [Source: Philips Semiconductors Application Note]
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