Posts Tagged ‘Square Wave 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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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 …
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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]
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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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An excellent tone burst generator can be made using 556 Dual Timer. We can connect the first half as a one-shot and the second half as an oscillator. The oscillator turns on because the pulse established by the one-shot turns, allowing a burst to be generated. Here is the circuit diagram:
[Source: Philips Semiconductors Application Note]
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Only with a single chip active component (4069 IC), this circuit will convert sine to square waves without a power-source. To test some audio instruments, we can use this circuit. Device purpose: This circuit intended to pick up the a sine wave from an existing generator and then converts that wave into good square waves. …
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