Digitally controlled oscillator

Details Digitally controlled oscillator Digitally controlled oscillator

1989-11-29

1991-04-30

Shaw, Dale M.

Boots, shoes, and leggings

G06F 1520

Patent

active

050124374

ABSTRACT:
A digitally controlled oscillator (DCO) includes a binary full adder having a first set of inputs coupled to input lines, a second set of inputs, a set of summation outputs and a carry output. A latch is provided having a set of latch inputs each coupled to one of the outputs of the binary full adder, a clock input and a set of latched outputs each coupled to one of the second set of inputs of the binary full adder wherein the binary full adder sums the bits of a latched period command signal which is provided on the input lines with bits appearing at the latched outputs and provides a summed value to the summation and carry outputs. A finite state machine is coupled to the carry output of the binary full adder and to the clock input of the latch wherein the machine produces the oscillator signal having a period determined by the period command signal.

REFERENCES:
patent: 3633115 (1970-04-01), Epstein
patent: 4049953 (1977-09-01), Evans, Jr.
patent: 4410954 (1983-10-01), Wheatley, III
patent: 4656649 (1985-12-01), Takahashi

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