Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1993-09-14
1997-04-15
Sikes, William L.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327427, 327563, H03K 522
Patent
active
056213395
ABSTRACT:
A differential input stage for a data conversion device includes two sections, one section for operating during a high stress portion of a charge transfer operation and one portion for operating during the remainder of the charge transfer operation. The first portion is comprised of two differential transistors (84) and (86) having the sources and bodies thereof connected to a source coupled node and connected through a switch (94) to a current source (92). The drains of transistors (84) and (86) are connected through switches (110) and (112), respectively, to output terminals. During the second half of the charge transfer operation, differential transistors (78) and (88), having the sources and bodies thereof connected to a source coupled node and connected to the current source (92) through a switch (90), are rendered operable with the drains thereof connected through switches (96) and (104), respectively, to the output terminals. Only one of the differential pairs is operable at any one time. When they are not operational, the sources, bodies and drains thereof are connected together and to a flush terminal (118) through respective switches. These switches flush out trapped oxide charges and allow the charges to once again become mobile.
REFERENCES:
patent: 4028558 (1977-06-01), Heller et al.
patent: 5142244 (1992-08-01), Glica et al.
patent: 5247210 (1993-09-01), Swanson
Theodore L. Tweksbury, Hae-Seung Lee and Gerald A. Miller, "The Effects of Oxide Traps on the Large-Signal Transient Response of Analog MOS Circuits" in IEEE Journal of Solid State Circuits, vol. 24, No. 2, Apr. 1989, pp. 542-544.
Gerald Miller, Michael Timko, Hae-Seung Lee, et al., "An 18b 10.mu.s Self-Calibrating ADC" in 1990 ISSCC Digest of Tech. Papers, pp. 168-169.
Khen-Sang Tan, Sami Kiriaki, Michiel DeWit, et al., "Error Correction Techniques for High-Performance Differential A/D Converters" in IEEE Journal of Solid-State Circuits, vol. 25, No. 6, Dec. 1990, pp. 1318-1327.
Kerth Donald A.
Swanson Eric J.
Crystal Semiconductor
Dudek James A.
Howison Gregory M.
Sikes William L.
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