Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit
Patent
1994-03-03
1995-10-03
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Nonlinear amplifying circuit
327563, 330257, H03F 345
Patent
active
054555353
ABSTRACT:
An interstage circuit functions to combine a first differential voltage and a second differential voltage, the first and second differential voltages being either positive or negative, to produce a current at a single ended output. A first pair of PNP transistors generates a first current corresponding to the first differential voltage, if positive, summed with a first bias current. A first pair of NPN transistors generates a second current corresponding to the second differential voltage, if positive, summed with a second bias current. A second pair of PNP transistors generates a third current corresponding to the first differential voltage, if negative, summed with the second current. A second pair of NPN transistors generates a fourth current corresponding to the second differential voltage, if negative, summed with the first current. The third current is subtracted from the fourth current to produce the current at the single ended output.
REFERENCES:
patent: 4333058 (1982-06-01), Hoover
patent: 4532479 (1985-07-01), Blauschild
patent: 4555673 (1985-11-01), Huijsing et al.
patent: 4560947 (1985-12-01), Frey
patent: 4600893 (1986-07-01), Sugimoto
patent: 4804904 (1989-02-01), Katakura
patent: 5153529 (1992-10-01), Koda et al.
Callahan Timothy P.
Hodes Alan S.
Lam T.
National Semiconductor Corporation
Nelson H. Donald
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