Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Reexamination Certificate
2005-02-01
2005-02-01
Nuton, My-Trang (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
C327S056000
Reexamination Certificate
active
06850096
ABSTRACT:
A circuit includes a first pre-amp circuit that provides a first pre-amp current and a second pre-amp circuit that provides a second pre-amp current. A first threshold circuit is configured to generate a first output signal responsive to a difference between a variable current and the first pre-amp current. A second threshold circuit is configured to generate a second output signal responsive to a difference between the variable current and the second pre-amp current. One of the branches of a differential interpolation circuit includes a first transistor that is connected in a current mirror configuration with the first pre-amp circuit. The first transistor has a width/length ratio equal to the product nk, where n<1. A second transistor is connected in a current mirror configuration with the second pre-amp circuit. The second transistor has a width/length ratio equal to the product mk, where m<1 and n+m is about 1. The interpolation circuit is configured to generate a third output signal responsive to a difference between the variable current and an interpolated reference current given by n*(first pre-amp current)+m*(second pre-amp current).
REFERENCES:
patent: 5528545 (1996-06-01), Takahashi et al.
patent: 5856748 (1999-01-01), Seo et al.
patent: 6194919 (2001-02-01), Park
patent: 6442091 (2002-08-01), Verbeck
patent: 6507175 (2003-01-01), Susak et al.
Liu Wentai
Nishida Yoshio
Myers Bigel & Sibley & Sajovec
Nuton My-Trang
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