×

Current controlled oscillator including conversion of control voltage to regular and thresholded control currents

  • US 5,105,169 A
  • Filed: 02/12/1991
  • Issued: 04/14/1992
  • Est. Priority Date: 02/13/1990
  • Status: Expired due to Term
First Claim
Patent Images

1. A voltage-controlled oscillator circuit, comprising:

  • an oscillating circuit for generating an oscillatory output signal with a frequency that varies responsive to an applied control current;

    main current control means for regulating said control current responsive to an applied control voltage;

    a thresholding circuit with a first threshold voltage and a second threshold voltage, said first threshold voltage being higher than said second threshold voltage, for receiving said control voltage and producing a thresholded signal having two states, a first state entered when said control voltage rises past said first threshold voltage and a second state entered when said control voltage falls below said second threshold voltage; and

    a constant-current circuit switched on and off by said thresholded signal, for varying said control current by adding a fixed current thereto.

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