Transducer servicing and isolation circuit - modulates HF oscillator feeding transformer whose output is full wave rectified and filtered, producing digitised output

摘要

The transducer servicing circuit produces a standard voltage digitized output and electrically isolates the transducer from its associated transmission line. The circuit is for use with transducers on gas turbine engines, boilers and the like, and is insensitive to heat and other disturbances. A transducer (1) with a digital output modulates a relatively H.F oscillator consisting of a diac (7) and resistance capacitance circuit, and this signal is fed to an isolating transformer (3). The output of this is full wave rectified (10, 11) and filtered to produce a standard voltage digitized output suitable for transmission down a line to a logic receiver network.