Small TV Modulator Using A Motorola MC1374

How can television modulator be small and simple like this? First, it uses integrated circuit, and the second, any TV modulator is nothing more than amplitude and frequency modulator. This simple circuit employ a Motorola MC1374 integrated circuit to form a small TV modulator.  To protect unwanted interference, this circuit need a shielded box and outboard circuitry.  The coil L1 […]

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Averager and Peak Hold/Extender Signal Conditioner

A signal averager circuit can be formed by an amplifier and active signal rectifier, which is implemented using two operational amplifiers in this circuit. The first op-amp is configured as inverting amplifier and the second forms an active half-wave rectifier. The half cycle signal is then filtered by an RC (resistor-capacitor) filter to get the average value. The gain of […]

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