Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-03-11
1998-03-31
Cunningham, Terry
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327536, G05F 302
Patent
active
057342911
ABSTRACT:
An integrated circuit voltage converter containing a capacitive charge pump performing DC to DC conversion is disclosed which detects, either automatically or by an external signal, the onset of a low power consumption situation and switches to a low power consumption mode. In one embodiment, the low power consumption mode is accomplished by reducing the operating frequency of the charge pump. In another embodiment, the switching transistors used to switch the capacitors in the charge pump during a low power consumption mode are smaller than those transistors used to switch the capacitors during its normal operating mode. In another embodiment, the DC to DC converter switches back and forth between a high frequency (burst) mode and a low frequency (low power) mode at intervals. In another embodiment, a combination of the power reduction techniques is used. Various techniques for detecting when a low power consumption mode is appropriate are also described.
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Collings Jerry M.
Tasdighi Ali
Cunningham Terry
Ogonowsky Brian D.
TelCom Semiconductor, Inc.
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