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CS209A

Part Number	CS209A
Manufacturer	Cherry Semiconductor
Description	Proximity Detector
Published	Mar 26, 2014
Detailed Description	CS209A CS209A Proximity Detector Description The CS209A is a bipolar monolithic integrated circuit for use in metal det...
Datasheet	CS209A PDF File

Overview

...ection/proximity sensing applications.
The IC (see block diagram) contains two on-chip current regulators, oscillator and low-level feedback circuitry, peak detection/demodulation circuit, a comparator and two complementary output stages.
The oscillator, along with an external LC network, provides controlled oscillations where amplitude is highly dependent on the Q of the LC tank.
During low Q conditions, a variable low-level feedback circuit provides drive to maintain oscillation.
The peak demodulator senses the negative portion of the oscillator envelop and provides a demodulated waveform as input to the comparator.
The comparator sets the states of the complementary outputs by comparing t...

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