Electronic digital logic circuitry – Interface – Logic level shifting
Patent
1995-11-28
1997-02-04
Westin, Edward P.
Electronic digital logic circuitry
Interface
Logic level shifting
326 71, 326 74, 326 50, H03K 190948
Patent
active
056002670
ABSTRACT:
A CMOS circuit is disclosed for translating a signal from CML to CMOS logic voltage levels. The CMOS circuit includes two amplifier circuits coupled in parallel. The first amplifier circuit comprises of a programmable circuit and a CMOS inverter such that the CMOS inverter can be programmed "on" or "off" by the programmable circuit. The programmable circuit includes a programmable element which may be implemented using a fuse or floating gate technology. The second amplifying circuit comprises of a CMOS inverter. When the CMOS inverter in the first amplifier circuit is powered "on", the CMOS circuit is operating in a full power mode at high speed with both CMOS inverters operating. When the CMOS inverter in the first amplifier circuit is powered "off", the CMOS circuit is operating in a low power mode at a slower speed with only one CMOS inverter operating. During the full power and low power modes of operation, the translator circuit converts the CML circuit output signal, which has a full rail-to-rail output swing of about 1 volt, to CMOS compatible voltage levels, which is required to drive a TTL level output circuit.
REFERENCES:
patent: 4638189 (1987-01-01), Geannopoulos et al.
patent: 4727266 (1988-02-01), Fujii et al.
patent: 4758746 (1988-07-01), Birkner et al.
patent: 4806793 (1989-02-01), Golab
patent: 4959564 (1990-09-01), Steele
patent: 4983862 (1991-01-01), Suzuki et al.
patent: 5134311 (1992-07-01), Biber et al.
patent: 5162672 (1992-11-01), McMahan et al.
patent: 5220216 (1993-06-01), Woo
patent: 5223751 (1993-06-01), Simmons et al.
patent: 5341045 (1994-08-01), Almulla
patent: 5355029 (1994-10-01), Houghton et al.
patent: 5355031 (1994-10-01), Fulkerson
Neil Weste and Kamran Eshraghian, Principles of CMOS VLSI Design, A Systems Perspective, Jun. 1988, pp. 225-227.
Bettman Roger
Wong Sing Y.
Yu Donald
Cypress Semiconductor Corporation
Driscoll Benjamin D.
Westin Edward P.
LandOfFree
Apparatus for a programmable CML to CMOS translator for power/sp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for a programmable CML to CMOS translator for power/sp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for a programmable CML to CMOS translator for power/sp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-682815