Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – With compensation
Patent
1998-01-23
1999-10-26
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
With compensation
327538, 327317, G06G 712
Patent
active
059735406
ABSTRACT:
A structure and a method are provided to receive a high-impedance reference voltage signal and generate a desired output signal that is capable of sourcing enough current to meet the demands of a fixed-resistance load. In such a circuit, the signal from an accurate, wide output-swing voltage source circuit having low quiescent current is combined with the output of a current source circuit so that the voltage input to the load is maintained even as the necessary current is supplied. The current source circuit preferably includes a tracking resistance that sinks a control current which a current mirror multiplies by the same ratio as that between the tracking resistance and the load resistance. In addition, it is preferable for the tracking resistance to be large compared to the load resistance, in order to minimize quiescent current draw, and also for the tracking resistors to be created and located at the same time and place as the load resistance, to minimize the effects of sheet resistance variations and temperature changes.
REFERENCES:
patent: 4777392 (1988-10-01), Maloberti et al.
patent: 5637992 (1997-06-01), Edwards
patent: 5701097 (1997-12-01), Fisher et al.
patent: 5874827 (1999-02-01), Hashimoto
Session XV: A/D Conversion, "A 10b 20MH.sub.z Two-Step Parallel ADC With Internal S/H", Toshihiko Shimizu, et al., ISSCC 88, Feb. 19, 1988, Digest of Technical Papers, pp. 224-225.
Session 2: Data Conversion, "A 10b 50MS/s Pipelined ADC" Pieter Vorenkamp, et al., ISSCC 92, 1992 IEEE International Solid-State Circuits Conference, pp. 32-33.
"An 8-bit Video ADC Incorporating Folding and Interpolation Techniques", Rob E.J. Van De Grift, et al., IEEE Journal of Solid-State Circuits, vol. SC-22, No. 6, Dec. 1987, pp. 944-953.
Kwok Edward C.
National Semiconductor Corporation
Tran Toan
LandOfFree
Ladder tracking buffer amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ladder tracking buffer amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ladder tracking buffer amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-768993