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System with functional and selector circuits connected by mode lead

  • US 6,987,382 B1
  • Filed: 10/26/2000
  • Issued: 01/17/2006
  • Est. Priority Date: 10/31/1995
  • Status: Expired due to Fees
First Claim
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1. An electronic system comprising:

  • A. a functional circuit having a mode input lead receiving a mode signal to place the functional circuit in one of a functional mode in which the functional circuit operates normally and a test mode in which at least part of the functional circuit is disabled; and

    B. a selector circuit having a mode output lead connected to the mode input lead of the functional circuit and having a pair of clock leads separate from the functional circuit, only one of the clock leads at one time receiving a clock signal that controls the state of the mode signal formed on the mode output lead.

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