Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Patent
1998-09-14
2000-12-05
Lam, Tuan T.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
327159, 331 57, H03L 7099
Patent
active
061572306
ABSTRACT:
An integrated circuit comprising a receiver, a transmitter, and a frequency lock loop configured to supply clock signals to the receiver and transmitter, the frequency lock loop including a current source having a thermal voltage generator, a current controlled oscillator having a plurality of selectively engageable current mirrors multiplying up the current of the current source, the frequency of the frequency lock loop varying in response to selection of the current mirrors, the current mirrors including transistors operating in a subthreshold mode. A method of operating an integrated circuit including a receiver, a transmitter, and a frequency lock loop configured to supply clock signals to the receiver and transmitter, the frequency lock loop including a current source having a thermal voltage generator, a current controlled oscillator having a plurality of selectively engageable current mirrors multiplying up the current of the current source, the frequency of oscillation of the frequency lock loop varying in response to selection of the current mirrors, the method comprising engaging selected current mirrors and operating transistors in the current mirrors in a subthreshold mode.
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Devereaux Kevin M.
Higgins Brian P.
Lowrey Tyler
O'Toole James E.
Ovard David K.
Lam Tuan T.
Micro)n Technology, Inc.
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