Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit
Patent
1993-05-28
1995-08-22
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Nonlinear amplifying circuit
327362, 327552, 327553, 330258, 330253, H03F 345
Patent
active
054444144
ABSTRACT:
A filter transconductance cell utilizes a differential gain stage which operates with a low voltage supply. The filter transconductance cell also includes a negative impedance converter to provide the cell with a high differential output impedance. The filter transconductance cell further includes an arrangement for sensing of a common-mode signal at the input of the differential gain stage and for generating in response thereto a current which is added to each common-mode current at the output of the differential gain stage to thereby produce common-mode rejection.
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Design Review Schematic--Simplified Gain Controlled Amplifier and Exponential AGC Control Combined H AGC and I AMP.
Callahan Timothy P.
Le Dinh
National Semiconductor Corporation
Nelson H. Donald
Pitruzzella Vincenzo D.
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