Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1994-08-02
1995-08-01
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327307, 330258, H03F 345
Patent
active
054382882
ABSTRACT:
A high output impedance setter utilizes a feedback loop to optimally set the gain of a negative impedance converter within a transconductance cell current source to thereby achieve a virtually infinite differential output impedance. The high output impedance setter also utilizes an operational amplifier to offset the inputs of a transconductance cell for a predetermined period commencing upon the application of power to the setter.
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Design Review Schematic-Simplified Gain Controlled Amplifier and Exponential AGC Control Combined H.sub.-- AGC and I.sub.-- AMP.
Callahan Timothy P.
Le Dinh
National Semiconductor Corporation
Nelson H. Donald
Pitruzzella Vincenzo D.
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