Analog signal level detecting apparatus

Details Analog signal level detecting apparatus Analog signal level detecting apparatus

2005-05-10

2005-05-10

Nguyen, Linh My (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S058000

Reexamination Certificate

active

06891407

ABSTRACT:
A rectified analog input signal is compared with a threshold voltage by a voltage comparator, and counting direction of an up/down counter is switched based on the comparison result, and a latch circuit retains an output of the up/down counter, and then an analog-digital converting circuit converts an output of the latch signal into a direct-current voltage. In addition, two input terminals, to which a clock for up-count operation and a clock for down-count operation are independently provided, is provided in the up/down counter, and a timing pulse generating circuit for determining reset timing of the up/down counting circuit and latch timing of the latch circuit is provided.

REFERENCES:
patent: 4302812 (1981-11-01), Fitch
patent: 4721865 (1988-01-01), Tallaron et al.
patent: 4973962 (1990-11-01), Shimizu
patent: 2790176 (1998-06-01), None

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