Precision fullwave rectifier
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 14, 2001
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N/A
app pub date -
Aug 9, 2000
filing date -
Sep 3, 1999
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Abstract
The present invention relates to a precision fullwave rectifier which is used in communication systems or non-linear signal processors. The present invention used in communication systems and non-linear signal processors includes an input part receiving a first alternating current input signal and a second alternating current input between which a phase difference of about 180.degree. exists wherein the input part generates a first current and a fourth current proportional to the first alternating current input signal and also generates a second current and a third current proportional to the second alternating current input signal, a first current subtractor outputting a fifth current by subtracting the second current from the first current, a second current subtractor outputting a sixth current by subtracting the fourth current from the third current, and an output part transforming and generate an wave-rectified output voltage by adding the fifth current to the sixth current. Besides, the input part further includes four NMOS transistors, each of the two current subtractors has four NMOS transistors, and the output part consists of a resistor.
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