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US 3,986,152 AGranted
Negative impedance network
AssigneeGeneral Electric Company
InventorEdward K. Howell
Life of this patent
Estimating the term…
Abstract
A negative impedance network includes a pair of network terminals, with one terminal connected to the base of an emitter-follower transistor. A current mirror includes one current path connected to supply a first current to a fixed impedance means through the collector-emitter circuit of the transistor and a second current path supplying a second current to the one network terminal in fixed ratio to the first current, such that an effective negative impedance is presented in parallel to an external circuit connected across the network terminals.
Claims4
A negative impedance network comprising, in combination:
- A. a pair of input/output terminals;
- B. a first transistor having a collector-emitter circuit and a base directly, DC connected to a first one of said terminals;
- C. a current mirror connected to a supply bus and including second and third transistors,
- 1. said second transistor having a collector directly connected to said first transistor such that the collector current of said second transistor constitutes the current flowing through the collector-emitter circuit of said first transistor, and
- 2.
2 more elements
Dependencies are inferred from the claim text.