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Here simple frequency tripler using CA3028 differential amplifier. CA3


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Frequency Tripler using CA3028
Here simple frequency tripler using CA3028 differential amplifier. CA3028 internal bias resistors setting differential amplifier's current about when connected shown. With this current, output level about with p-p, input. Other frequencies multiplication factors possible CA3028 replaced discrete transistors. amplifier's current increased connecting resistor from ground achieve more output operation with lower power supply voltage. Amplitude modulation applied output frequency capacitor coupling audio
.01uf
.68uh adj.
.1uf
CA3028 33pf 6.8pf
.01uf
Figure multiplier using differential amplifier
Specification Limitations: Amplifier current Collector voltage: Power dissipation:
2.8k ohms
Figure Inside CA3028

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