Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Patent
1993-12-16
1995-08-22
Stephan, Steven L.
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
G05F 316
Patent
active
054443636
ABSTRACT:
A low noise apparatus for receiving an input current and producing an output current which mirrors the input current significantly increases accuracy and signal-to-noise ratio by greatly reducing the effects resulting from threshold voltage mismatches and 1/.function. noise. The apparatus comprises two cascode current mirrors. Further, the apparatus comprises a switching network which, in turn, comprises a plurality of switches formed within either a first or second electrical path. A first clock controls the switches formed within the first electrical path, while a second clock controls the switches formed within the second electrical path. When the first clock is in its first state and the second clock is in its second state, the switches formed within the first electrical path close to form the first cascode current mirror. However, the switches formed within the second electrical path remain open. Conversely, when the first clock is in its second state and the second clock is in its first state, the switches formed within the second electrical path close to form the second cascode current mirror. However, the switches formed within the first electrical path remain open. Consequently, the apparatus modulates a significant percentage of the threshold voltage mismatch up to the operating frequency of the two clocks. As a result, the first order error term resulting from the threshold voltage mismatch is eliminated and 1/.function. noise is reduced.
REFERENCES:
patent: 4829266 (1989-05-01), Pernici et al.
patent: 4897596 (1990-01-01), Hughes et al.
patent: 4939516 (1990-07-01), Early
patent: 5039989 (1991-08-01), Welland et al.
patent: 5113129 (1992-05-01), Hughes et al.
patent: 5126685 (1992-06-01), Platt et al.
patent: 5243235 (1993-09-01), Wakayama et al.
Advanced Micro Devices , Inc.
Nguyen Matthew V.
Stephan Steven L.
LandOfFree
Low noise apparatus for receiving an input current and producing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Low noise apparatus for receiving an input current and producing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low noise apparatus for receiving an input current and producing will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2144280