Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Reexamination Certificate
2011-03-22
2011-03-22
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
C327S109000, C327S110000, C327S111000, C327S112000, C327S562000, C327S563000
Reexamination Certificate
active
07911244
ABSTRACT:
A differential drive circuit includes at least a first or second drive system. The first drive system has first and second field effect transistors, first and second resistors, and first and second circuits controlling the source voltages of the first and second field effect transistors to equal first and second drive target voltages, the first and second field effect transistors having sources connected to a power potential via the first and second resistors, respectively. The second drive system has third and fourth field effect transistors, third and fourth resistors, and third and fourth circuits controlling the source voltages of the third and fourth field effect transistors to equal third and fourth drive target voltages, the third and fourth field effect transistors having sources connected to a reference potential via the third and fourth resistors, respectively. A common-mode voltage is driven to form a constant differential signal across a load resistance.
REFERENCES:
patent: 2008/0174462 (2008-07-01), Tsuchi
patent: 2003-347860 (2003-12-01), None
patent: 2006-340266 (2006-12-01), None
patent: 2006-345259 (2006-12-01), None
patent: 2007-312395 (2007-11-01), None
Ichimura Gen
Kikuchi Hidekazu
Ozawa Miho
Donovan Lincoln
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Poos John W
Sony Corporation
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