Power decoupling circuit for loop powered time-of-flight...

Details Power decoupling circuit for loop powered time-of-flight... Power decoupling circuit for loop powered time-of-flight...

2005-12-06

2005-12-06

Nguyen, Vinh (Department: 2829)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

C324S1540PB

Reexamination Certificate

active

06972584

ABSTRACT:
A power decoupling circuit for a time-of-flight ranging or level measurement system coupled to a current loop. The level measurement system receives power from the current loop and includes a loop current regulator. The loop current regulator is responsive to signals from a controller for regulating the current in the loop to transmit level measurement data and other information. Power is also taken from the current loop to energize a transducer for generating pulses for performing level measurements. The power decoupling circuit comprises a feedback circuit and a step-up converter. The step-up converter provides charging current to an energy storage device for the transducer and may also generate a voltage gain. The feedback circuit controls the voltage drop across the loop current regulator to minimize losses on it and maximize power available for measurement.

REFERENCES:
patent: 6586958 (2003-07-01), Sudo et al.
patent: 6836173 (2004-12-01), Yang

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