H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/83
H02M 7/217 (2006.01) G06G 7/12 (2006.01) H03D 1/18 (2006.01)
Patent
CA 1183893
ABSTRACT OF THE DISCLOSURE An improved current mode operational rectifier includes an operational amplifier, a first feedback path for the amplifier for one polarity of input signal, a second feedback path for the amplifier for the other polarity of input signal, and a device for limiting the loop transmissions through both feedback paths to unity gain. An improved bias generator for biasing the operational rectifier is also disclosed. The bias generator provides for the generation of a voltage across a first impedance load so that (1) a current is generated through a first load resistance, (2) a current is generated through a second resistance of a second impedance load, and (3) a biasing voltage is generated across the second impedance load. The device for generating the voltage across the first impedance load permits the setting of the level of the voltage across the first impedance load, which in turn (a) defines a first reference voltage, (b) defines a second reference voltage, and (c) provides a difference voltage in response to a comparison between the first and second reference voltages. The difference voltage is related to the difference in voltage drop across the base-emitter junction of at least two transistors as a function of the change of temperature at the junctions.
390862
Dbx Inc.
Macrae & Co.
LandOfFree
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