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Software controlled latched voltage regulator having wiper switch decoding

  • US 5,712,547 A
  • Filed: 05/31/1995
  • Issued: 01/27/1998
  • Est. Priority Date: 05/31/1995
  • Status: Expired due to Term
First Claim
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1. A motor-operated wiper control system, comprising:

  • switch means responsive to user actuation for selecting one of a plurality of wiper functions and for generating in response thereto a switch multiplexed signal corresponding to the selected wiper function;

    wiper position detecting means for detecting a position of the wiper and generating a position signal indicative of the detected position;

    a power latch and decoder circuit having an output node and including regulator means responsive to a direct current (DC) power source for generating a regulated voltage at said output node, said regulator means including means for generating a reference signal, said circuit further including decoder means responsive to said switch multiplexed signal and said reference signal for generating a wiper function signal indicative of the selected wiper function, said circuit further including latch means for enabling said regulator means to generate said regulated voltage when in an energized state and for discontinuing generation of said regulated voltage when in a deenergized state;

    control means responsive to said position signal for controlling the motor to move the wiper in accordance with said wiper function signal, said control means being coupled to said output node for obtaining operating power therefrom.

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