Tag Archives: Oscillators

Frequency Modulated Oscillator (for FM Transmitter)

Posted on January 2, 2012 by Rust

An oscillator can be built using LC (inductor-capacitor) tank circuit. When we vary the capacity of the capacitor in LC tank circuit then the frequency of the oscillator will vary according to capacitance change.  The idea of this modulator is … Continue reading →

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Voltage to Frequency Converter Using UJT

Posted on October 28, 2011 by Rust

The following voltage to frequency converter (V/FC – VCO) circuit consist of a UJT (uni-junction transistor) oscillator in which the timing charge capacitor C2 is linearly depends on the input signal voltage. The voltage across resistor R5 set the charging … Continue reading →

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Digitally Programmable Oscillator

Posted on February 22, 2011 by Rend

The schematic diagram below shows a digitally programmable oscillator circuit. This programmable oscillator circuit is based on V/F (voltage to frequency) converter, which is programmable by an analog voltage at the input. To make it digitally programmable, a DAC (digital … Continue reading →

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