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TDA7000 is an IC for FM portable radios which has a Frequency-Locked-Loop system with an intermediate frequency of 70kHz. The TDA7000 has the following functions: RF input stage, mixer, local oscilator, IF demodulator, mute detector and mute switch. The diagram below shows you with the block diagram of this FM radio monolithic IC.
Here is the picture of ICL7106 Typical application and Test Circuits in the ICL7106 Datasheet. This device was the first IC contain all the active circuitry for a 3 1/2 digit panel meter (DPM) in a single chip and is designed to interface with a liquid crystal display (LCD).
If you need a power-supply control device which has all the functions of Pulse-Width-Modulation control circuit in a single chip, you may consider the TL494 PWM control circuit. Below we provide you with its Operational Test Circuit Diagram, Waveforms and the datasheet.
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