Heterodyne Mixer (CB4291E)

This is a typical 80's FM radio mixer circuit. The circuit was found in a documentation of the time.

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Wien Bridge Generator (CB39010E)
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This AC amplifier using the 741 operational amplifier uses a dual supply from 5 to 12 V. The input...
5V Voltage Reducer (CB5000E)
This circuit was found in the Spanish magazine No longer in existence, Mundo Electrónico, in a...