H - Electricity – 03 – L
Patent
H - Electricity
03
L
328/87
H03L 7/06 (2006.01) H03K 5/135 (2006.01)
Patent
CA 1304457
NARROW RANGE DIGITAL CLOCK CIRCUIT Abstract of the Disclosure The invention provides a digital clock circuit for providing an output clock signal having a frequency varying between predetermined limits. A digital frequency changer circuit is responsive to a fixed frequency signal and to control signals for generating the output clock signal. A circuit means is responsive to a variable reference signal and to the output signal of the clock circuit for generating a binary control word representative of a frequency difference therebetween. A rate multiplier circuit is responsive to the binary control word and the output clock signal for generating the control signals. The only non- digital component of the clock circuit is a local crystal oscillator. - i -
591798
Nortel Networks Limited
Turpin F.
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