H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/12
H03F 3/50 (2006.01) H03F 3/38 (2006.01)
Patent
CA 1275709
- 1 - Abstract of the Disclosure A transconductance amplifier for emitting an output current that is a replica of an input voltage has its accuracy enhanced by a current comparator having a first magnetic core, a second magnetic core, a pair of ratio windings electromagnetically coupled with both the cores, and a detection winding electromagnetically coupled with the first core but not with the second core. A first of the ratio windings is connected in series with the output current of the transconductance amplifier. A high value resistor is connected in series with the second of the ratio windings across the input voltage of the trans- conductance amplifier whereby the current in the second ratio winding accurately reproduces the waveform of the input voltage. A further amplifier has its input connected to the detection winding. The output of this amplifier is so connected as to add a correcting current to the output current of the transconductance amplifier and thus provide the necessary accuracy enhancement.
580841
Kirby Eades Gale Baker
Miljanic Petar N.
National Research Council Of Canada
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