Two Transistors FM Transmitter

Basically, this circuit is a radio frequency (RF) oscillator that operates around 100 MHz. The audio which is picked up and amplified by the electret microphone is fed into the audio amplifier stage built around the first transistor. Output from the collector is fed into the base of the second transistor. By varying the junction capacitance of the transistor, this […]

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Voltage-Controlled Tone/Volume/Balance Circuit

The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit which can be applied in car radio, TV and audio systems. Loudness compensation to be simply effected is allowed by an additional control input. Control of the bass, treble, balance and volume function are provided by four control inputs through application of DC voltages from remote control system […]

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