Analog Devices,inc.

Conexant Systems, Inc.

Efram Burlingame

Mikko Waltari

Stephen Robert Kosic

A system, method, and computer program product for generating a regulated boosted load voltage. A comparator may use reduced versions of a reference voltage, a supply voltage, and a fed-back output load voltage to determine whether the output load voltage requires adjustment. If so, a controller may responsively vary the number of voltage boosting charge pumps connected in parallel to the load to best match a target voltage. The target voltage may be the reference voltage plus the supply voltage. A counter may track the number of active charge pumps, and may increment or decrement the number more slowly than the charge pumps operate. Loop gain may be limited by an integrating filter to prevent oscillation. The embodiments are of particular utility for signal conversion circuitry as they eliminate difficulties arising from gate-source voltage inadequacies and differences in switch transistors. A wider range of reference voltages may be accommodated.

System and method for generating a regulated boosted voltage using a controlled variable number of charge pump circuits

A DLL comprises detection circuitry configured to detect a too_slow and a too_fast operating state and correction circuitry configured to correct operation of the DLL when a too_fast or too_slow state is detected. The correction circuitry can be configured to swallow a pulse of the input clock signal when a too_fast condition is detected. The correction circuitry can also be configured to force the DLL into a too_fast operation state, when a too_slow operation state is detected. The correction circuitry can then also be configured to swallow a pulse of the input clock signal once the DLL is in the too_fast operation state.

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San Diego, CA, United States of America

Efram Burlingame