Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1995-10-18
1996-07-23
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327427, 327220, 327 89, 327 96, G01R 1900, H03K 3037
Patent
active
055393390
ABSTRACT:
A load stage including a first transistor whose channel is connected between a first terminal and a first node, a second transistor whose channel is connected between a second terminal and a second node, a third transistor whose channel is connected between the first node, a third terminal and a fourth transistor whose channel is connected between the second node and the third terminal and a switch between the first and the second terminal. The gates of the first and the fourth transistor are connected to the first terminal. The gates of the second and the third transistor are connected to the second terminal. The load stage also includes a switch connected between the first node and the second node. When the switch is closed the first and the second transistor form a positive differential impedance between the first and the second terminal. When the switch is open the cross-coupled third and fourth transistors form a negative differential impedance between the first and the second terminal.
REFERENCES:
patent: 3573499 (1971-04-01), Lynes
patent: 3849675 (1974-11-01), Waaben
patent: 4053873 (1977-10-01), Freeman et al.
patent: 5311085 (1994-05-01), Pelgrom et al.
patent: 5381053 (1995-01-01), Yasuda
B. S. Song & M. F. Tompsett, "A 10b 15MHz Recycling Two-Step A/D Converter", ISSCC 90, Feb. 15, 1990, Imperial Ballroom, 1:30pm, Session 10: Analog-to-Digital Converters, pp. 158-159, 289.
Gathman Laurie E.
Tran Toan
U.S. Philips Corporation
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