×

Power-on-reset circuit including integration capacitor

  • US 5,166,545 A
  • Filed: 07/10/1991
  • Issued: 11/24/1992
  • Est. Priority Date: 07/10/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. A circuit, comprising:

  • a power-on reset pulse generating circuit, which will generate a pulse at any sudden increase of a power supply voltage;

    a fully symmetrical pair of cross-coupled logic gates;

    first and second blocking gates, each of said blocking gates having a first input operatively connected to receive an output of a respective one of said pair of cross-coupled gates and a second input connected to receive pulses generated by said pulse generating circuit, and configured to output a pulse only when both said inputs thereto have respectively predetermined states;

    a combining gate connected to receive an output of each of said blocking gates and to transmit a pulse which is received from either of said blocking gates; and

    a feedback connection connected to disable said pair of cross-coupled gates wherever said power supply voltage is active and a power-on reset pulse is not being received by said combing gate.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×