Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1996-06-13
1998-08-25
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327 89, 327563, 330311, H03K 522
Patent
active
057986606
ABSTRACT:
A cascoded differential amplifier with a circuit for the injection of current to enhance the gain is described. The differential amplifier includes a differential pair of n-MOS FET's connected to a current source an a positive and a negative input terminal. A pair of isolation n-MOS FET's are inserted between the differential pair and a pair of current source loads. These isolate the current source loads from the differential pair. A current injector is connected to the drains of the n-MOS FET's of the differential pair. The isolation n-MOS FET's and the injected currents enhance the gain of the differential amplifier. A level translation circuit adjusts the output levels of the differential pair to levels required by circuitry attached to the output terminals of the level translation circuitry. A voltage biasing generation circuit creates bias voltages necessary to establish the currents through the differential amplifier, the amounts of injection current, the level the load currents, and the output voltage levels of the level translation circuit.
REFERENCES:
patent: 4481478 (1984-11-01), Flink et al.
patent: 4881044 (1989-11-01), Kinoshita et al.
patent: 5034700 (1991-07-01), Herrmann et al.
patent: 5047665 (1991-09-01), Burt
patent: 5070306 (1991-12-01), Okamoto
patent: 5362995 (1994-11-01), Kubo
patent: 5442318 (1995-08-01), Badyal et al.
"MOS Sampled Data Recursive Filters Using Switched Capacitor Integrators" by Hosticka et al, IEEE Journal of Solid State Circuits, vol. SC-12, No. 6, Dec. 1977, pp. 250-258.
Ackerman Stephen B.
Saile George O.
Tran Toan
Tritech Microelectronics International Pte Ltd.
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