Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Particular stable state circuit
Reexamination Certificate
2006-01-24
2006-01-24
Tra, Quan (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Particular stable state circuit
C327S208000, C327S218000
Reexamination Certificate
active
06989702
ABSTRACT:
State retention registers for use in low-power standby modes of digital IC operation are provided, wherein: a differential circuit (M1–M3; M1–M4) is used to load the shadow latch from the normal functional latch; the signal (REST, RESTZ) used to restore data from the shadow latch to the normal functional latch is a “don't care” signal while the shadow latch is retaining the data during low-power standby mode; retained data from the shadow latch is restored to the normal functional latch via a transistor gate connected to anode (N10) of the shadow latch where the retained data is provided; a power supply (VDD) other than the shadow latch's power supply (VRETAIN) powers the data restore operation; and the normal functional latch is operable independently of the operational states of the high Vttransistors (M1, M2, M5and M6; M3, M4, M5and M6) used to implement the state retention functionality. In addition, an isolation apparatus is provided to retain an output of a logic module while the logic module is powered-down.
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Cumming Peter H.
Dahan Franck
Gururajarao Sumanth
Ko Uming
Mair Hugh T.
Brady III Wade James
Neerings Ronald O.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
Tra Quan
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