RESEARCH ON HIGH PRECISION LOGARITHMIC AMPLIFYING CIRCUIT

Kong Junbao

Volume 9 Issue 5

Sep. 1987

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Kong Junbao. RESEARCH ON HIGH PRECISION LOGARITHMIC AMPLIFYING CIRCUIT[J]. Journal of Electronics & Information Technology, 1987, 9(5): 404-412.

Citation:

Kong Junbao. RESEARCH ON HIGH PRECISION LOGARITHMIC AMPLIFYING CIRCUIT[J]. Journal of Electronics & Information Technology, 1987, 9(5): 404-412.

Kong Junbao. RESEARCH ON HIGH PRECISION LOGARITHMIC AMPLIFYING CIRCUIT[J]. Journal of Electronics & Information Technology, 1987, 9(5): 404-412.

Citation:

Kong Junbao. RESEARCH ON HIGH PRECISION LOGARITHMIC AMPLIFYING CIRCUIT[J]. Journal of Electronics & Information Technology, 1987, 9(5): 404-412.

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RESEARCH ON HIGH PRECISION LOGARITHMIC AMPLIFYING CIRCUIT

Kong Junbao

Received Date: 1985-06-13
Rev Recd Date: 1987-03-05
Publish Date: 1987-09-19

Abstract

Abstract

A high precision logarithmic amplifier with wide passband is achieved by using the charge and discharge of RC and the method of pulse-width modulation. It can be used in the astronomy, astronavigation, accurate measurement, communication etc. The theoretical analysis of the circuit is given. A practical circuit is constructed, and the experimental result shows that the logarithmic function for the circuit reaches 99% of the theoretical value.

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References(1)

References

R. S. Hughes, Logarithmic Video Amplifier, Dedham, Mass., Artech Houae, 1971.[2]孔俊宝,电信科技情报,1979年,第5期,第14页.[3]孔俊宝,电信科技情报,1981年,第4期,第30页.[4]孔有林,集成运算放大器及其应用,人民邮电出版社,1980.

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