Closed circuit blocked in phase, closed circuit filter that filters an error signal from it, and processes to control the circuit and filter

摘要

'' CLOSED CIRCUIT LOCKED IN PHASE, CLOSED CIRCUIT FILTER THAT FILTERS AN SAME ERROR SIGNAL, AND PROCESSES TO CONTROL THE CIRCUIT AND FILTER '' Systems and processes for directing the charge pump force a charge pump from a filter closed circuit of a closed circuit blocked in phase charging or discharging a capacitor for a predetermined time that is independent of the error signal of the phase detector. The charge pump is then activated in response to a phase detector error signal. Accordingly, instead of relying on the error signal to activate a charge pump, the charge pump can be activated for a period of time that will help to add or remove a required amount of charge to, or, the closed loop filter. Shortened blocking times can thus be produced while allowing a reduction in the size and cost of the charge pump. The invention is preferably applied to an integral load pump in a closed circuit locked in phase.