Adaptively extending tunable range of frequency in a closed loop

A semiconductor device or a circuit includes a controllable oscillator and circuitry that senses a voltage which may control the controllable oscillator and digitally controls a gain compensation, adaptively compensating for a drop in a gain against overall loop gain within a closed loop. In one emb...

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Bibliographic Details
Main Authors Ravi, Ashoke, Soumyanath, Krishnamurthy, Banerjee, Gaurab
Format Patent
LanguageEnglish
Published 26.04.2005
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Summary:A semiconductor device or a circuit includes a controllable oscillator and circuitry that senses a voltage which may control the controllable oscillator and digitally controls a gain compensation, adaptively compensating for a drop in a gain against overall loop gain within a closed loop. In one embodiment, a single supply source may be used to power the closed loop while a variable gain stage that is digitally controllable may adjust the gain in a feed-forward manner based on the drop.