Electronic digital logic circuitry – Signal sensitivity or transmission integrity – Signal level or switching threshold stabilization
Reexamination Certificate
2008-03-31
2009-10-13
Tran, Anh Q (Department: 2819)
Electronic digital logic circuitry
Signal sensitivity or transmission integrity
Signal level or switching threshold stabilization
C326S062000, C326S032000, C326S082000
Reexamination Certificate
active
07602210
ABSTRACT:
A two-wire transmitter for receiving power supply from an external circuit through two transmission lines and also transmitting a current signal based on the measurement value of a sensor includes a current control section to which a voltage is supplied from an external circuit, for controlling the current value of the current signal based on an electric signal responsive to the measurement value of the sensor, if current consumption of the two-wire transmitter becomes smaller than the current value of the current signal, the current control section for charging and if the current consumption becomes larger than the current value of the current signal, the current control section for discharging; a computation control section for outputting the electric signal to the current control section and also outputting a setting signal based on predetermined computation processing information; a clock supply circuit for controlling the frequency of a clock signal based on the setting signal and supplying the clock signal to the computation control section; and a constant-voltage circuit for setting output voltage of the current control section to a predetermined voltage and supplying the voltage at least to the computation control section and the clock supply circuit.
REFERENCES:
patent: 2007/0071082 (2007-03-01), Rauer et al.
patent: 3090001 (2000-07-01), None
Nutter & McClennen & Fish LLP
Penny, Jr. John J.
Tran Anh Q
Yokogawa Electric Corporation
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