Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1997-06-10
1998-10-13
Cabeca, John W.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307125, 307138, 327 29, 327 82, 331111, 331129, 320 25, 363 63, H02M 137
Patent
active
058216430
ABSTRACT:
A synchronization control scheme that provides a drive signal to a plurality of switching circuits and method of operation therefor. The synchronization controller, includes: (1) a plurality of dual threshold relaxation oscillators, coupled to a corresponding plurality of storage devices, that each assume a first state when a characteristic across a corresponding storage device is below a first threshold value and a second state when the characteristic across the corresponding storage device is above a second threshold value, (2) an oscillator OR-ing circuit, coupled to outputs of the plurality of dual threshold relaxation oscillators, that, when a controlling one of the plurality of dual threshold relaxation oscillators assumes the first state, allows the controlling one of the plurality of dual threshold relaxation oscillators to control the plurality of dual threshold relaxation oscillators, (3) a plurality of frequency dividers, coupled to corresponding ones of the plurality of dual threshold relaxation oscillators, that divide an OR-ed output of the plurality of dual threshold relaxation oscillators and (4) a divider OR-ing circuit, coupled to outputs of the plurality of frequency dividers, that maintains a phase synchronization between the plurality of frequency dividers and provides the drive signal to the plurality of switching circuits.
REFERENCES:
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patent: 5182466 (1993-01-01), Ohkibo
patent: 5481211 (1996-01-01), Vietze et al.
Cabeca John W.
Lucent Technologies - Inc.
Paladini Albert W.
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