Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-06-19
2007-06-19
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S540000
Reexamination Certificate
active
11123639
ABSTRACT:
A reference voltage and reference current generator supplies a reference voltage and a reference current, both having stable levels regardless of temperature variation. The reference voltage and reference current generator includes a reference voltage generating unit, a first current mirror, a temperature compensation MOS transistor and a second current mirror. The reference voltage generating unit outputs a reference voltage having a stable level regardless of temperature variation and process variation by using junction voltage characteristic and thermal voltage characteristic of a bipolar transistor, and supplies an inner current corresponding to the thermal voltage characteristic. The first current mirror supplies a first current by mirroring the inner current. The temperature compensation MOS transistor supplies a second current corresponding to the reference voltage through the source-drain stage. The second current mirror supplies a reference current corresponding to the sum of the first current and the second current.
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Blakely & Sokoloff, Taylor & Zafman
Callahan Timothy P.
Magnachip Semiconductor Ltd.
Nguyen Hai L.
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