Method and circuit for controlling the frequency of an electroni

Details Method and circuit for controlling the frequency of an electroni Method and circuit for controlling the frequency of an electroni

1990-03-12

1991-09-10

Heyman, John S.

Electrical pulse counters, pulse dividers, or shift registers: c

Systems

Pulse multiplication or division

328 15, 377 49, 377 50, H03B 1900

Patent

active

050480650

ABSTRACT:
A method for modifying the frequency of a clock signal includes the steps of producing a clock signal having voltage pulses which occur at a first frequency and producing a control signal having voltage pulses which occur at a lower frequency. The frequency of the voltage pulses in the control signal is incremented in successive time intervals and the clock signal and control signal are combined such that one voltage pulse in the clock signal is deleted for each voltage pulse in the control signal. This results in a modified clock signal having a frequency which may be ramped up or down depending upon the initial frequency of the control signal and the direction in which the frequency of the control signal is incremented.

REFERENCES:
patent: 4101838 (1978-07-01), Aihara et al.
patent: 4184068 (1980-01-01), Washburn
patent: 4573175 (1986-02-01), Cressey et al.
patent: 4573176 (1986-02-01), Yeager
patent: 4618920 (1986-10-01), Fox
patent: 4839603 (1989-06-01), Mower et al.
patent: 4851783 (1989-07-01), Rabiger

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