Prescaling for dividing fast pulsed signal

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Frequency or repetition rate conversion or control

Reexamination Certificate

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C327S117000, C327S151000, C377S052000, C377S118000

Reexamination Certificate

active

06952121

ABSTRACT:
Circuits, devices and methods are provided for dividing a fast pulse signal by an integer M. A dual modulus prescaler receives input pulses, counts them, and generates one prescaled pulse for every Qth input pulse. Q is a division modulus, and has a different value depending on a modulus control signal. When the prescaler generates a prescaled pulse from an input pulse, it ignores the modulus control signal at least until the onset of a next input pulse. A program counter generates a reset signal when the prescaler receives the Mth input pulse. A swallow counter then changes the modulus control signal to a different value, and the prescaler starts dividing by a different modulus. Even if the prescaler had already received the onset of the next input pulse, it accounts for it properly, for dividing with the different modulus.

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