Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2005-06-14
2005-06-14
Jeanglaude, Jean Bruner (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C330S009000, C326S083000, C326S086000, C326S068000, C327S563000
Reexamination Certificate
active
06906651
ABSTRACT:
A constant current source with threshold voltage and channel length modulation includes first, second, third, fourth and fifth MOS transistors. Each of the MOS transistors has gate, first and second terminals. The first terminal of the second MOS transistor is coupled to loading impedance, and its second terminal is coupled with the first terminal of the first MOS transistor. The gate terminal and first terminal of the third MOS transistor are together coupled to the gate terminal of the second MOS transistor, and its second terminal is coupled to the first terminal of the fourth MOS transistor. The gate terminal and first terminal of the fourth MOS transistor are coupled to the gate terminal of the first MOS transistor, and its second terminal is coupled to a first reference voltage. The gate terminal and second terminal of the fifth MOS transistor are respectively coupled to a second reference voltage and a third reference voltage, and its first terminal is coupled to the gate terminal and first terminal of the third MOS transistor.
REFERENCES:
patent: 5517152 (1996-05-01), Miki et al.
patent: 5598122 (1997-01-01), McClure
patent: 5619166 (1997-04-01), Gross
patent: 5798658 (1998-08-01), Werking
patent: 5936392 (1999-08-01), Taylor
patent: 6008679 (1999-12-01), Masuda
patent: 6081131 (2000-06-01), Ishii
patent: 6320417 (2001-11-01), Kirsch et al.
patent: 6515520 (2003-02-01), Kiyose
patent: 6587000 (2003-07-01), Oikawa
patent: 6621334 (2003-09-01), Ausserlechner et al.
patent: 6657485 (2003-12-01), Kimura
patent: 230284 (1994-03-01), None
Chin et al.,A 10b 125-MHz CMOS Digital-to-Analog Converter(DAC)with Threshold-Voltage Compensated Current Sources, IEEE Journal of Solid-State Circuits, vol. 29, No. 11 (1994), pp. 1374-1380.
Lin Chun Wei
Yang Ching Hsiang
Seyfarth Shaw LLP
Spirox Corporation
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