Digital frequency synthesizer and method of frequency synthesis

Details Digital frequency synthesizer and method of frequency synthesis Digital frequency synthesizer and method of frequency synthesis

1992-01-17

1992-11-03

Sikes, William L.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307529, H03B 1900

Patent

active

051608944

ABSTRACT:
A frequency synthesizer circuit (10). Circuit (10) has a counter (12), a latch/decoder (14), a divider (16), and an optional wave shaper (18) which synthesize an output clock signal X. Counter (12) counts a number of clock signal N periods that occur within one clock signal M period and this count is stored as a count value. The count value is latched and/or decoded by the latch/decoder (14) to produce a divisor which is output from the latch/decoder (14) to the divider (16). The divider (16) divides a clock signal N frequency by the divisor to provide a spiked waveform to the wave shaper (18). The wave shaper (18) alters a frequency and/or a duty cycle of the spiked waveform to produce the clock signal X. Clock signal X has a substantially constant frequency regardless of the clock signal N frequency or operational variation in the system clock N frequency.

REFERENCES:
patent: 5054039 (1991-10-01), Blackmon et al.
patent: 5095279 (1992-03-01), Quan et al.

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