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Method and apparatus for coin or object sensing using adaptive operating point control

  • US 20030057054A1
  • Filed: 10/05/2001
  • Published: 03/27/2003
  • Est. Priority Date: 09/21/2001
  • Status: Active Grant
First Claim
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1. A device for controlling a coin discriminator, comprising:

  • at least one processor coupled to receive and monitor coin signals at each of two or more frequencies, wherein the coin signals include signals representing size and composition of a passing coin; and

    at least one amplifier coupled to the at least one processor, wherein the at least one amplifier automatically provides at least one control signal to control a quiescent voltage level of the coin signals over at least one range of operating temperatures.

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