High-precision oscillator

High-precision oscillator

  • CN 102,931,913 A
  • Filed: 10/31/2012
  • Published: 02/13/2013
  • Est. Priority Date: 10/31/2012
  • Status: Active Application
First Claim
Patent Images

1. high precision oscillator, it is characterized in that, comprising:

  • reference voltage source, resistor voltage divider circuit, operational amplifier, comparator, status register, the first inverter, the second inverter, the 3rd inverter, the 4th inverter, the 5th inverter, integrator capacitor C 1, the first switch-capacitor C2, the second switch-capacitor C3, the switch element S1 of RST signal controlling, the switch element S2 of SEL signal controlling, the switch element S3 of SELB signal controlling, the switch element S4 of SELB signal controlling, the switch element S5 of SEL signal controlling, the switch element S6 of RSTB signal controlling and charging resistor R4;

    Connect with the switch element S2 of SEL signal controlling after the switch element S4 parallel connection of the first switch-capacitor C2 and SELB signal controlling, consist of the first switch-capacitor charge-discharge circuit;

    Connect with the switch element S3 of SELB signal controlling after the switch element S5 parallel connection of the second switch-capacitor C3 and SEL signal controlling, consist of the second switch-capacitor charge-discharge circuit;

    An end ground connection after the switch element S6 parallel connection of the first switch-capacitor charge-discharge circuit, the second switch-capacitor charge-discharge circuit and RSTB signal controlling, "-" input of other end difference concatenation operation amplifier, "-" input of comparator, this other end also connects the output of reference voltage source behind the switch element S1 of charging resistor R4, RST signal controlling;

    The output of "+" input connecting resistance bleeder circuit of operational amplifier, the output of operational amplifier connects "+" input of comparator;

    Be connected in series integrator capacitor C 1 between the output of operational amplifier and "-" input;

    Status register is the d type flip flop with asynchronous reset, the output of comparator connects " CK " end of d type flip flop, serial connection the first inverter between " Q " end of d type flip flop and " D " end, " RN " end of d type flip flop connects the second inverter, and " Q " of d type flip flop holds be linked in sequence the 3rd inverter, the 4th inverter, the 5th inverter;

    " RN " end of d type flip flop is systematic reset signal RST, and the second inverter output is the inversion signal RSTB of RST, and the 3rd inverter output is the SEL signal, and the 4th inverter output is the SELB signal, and the 5th inverter output is the CLK signal.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×