AMPLIFIER

PURPOSE:To increase the maximum input level of a transfer impedance amplifier used for an optical receiver or the like. CONSTITUTION:This amplifier is composed of a transfer impedance amplifier 2 provided with a feedback part constituted by parallelly connecting a feedback resistor 9 and a transisto...

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Bibliographic Details
Main Authors MARUYAMA MAKOTO, ERA YOSHIKAZU
Format Patent
LanguageEnglish
Published 25.03.1994
Edition5
Subjects
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
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Summary:PURPOSE:To increase the maximum input level of a transfer impedance amplifier used for an optical receiver or the like. CONSTITUTION:This amplifier is composed of a transfer impedance amplifier 2 provided with a feedback part constituted by parallelly connecting a feedback resistor 9 and a transistor 13 for current branch, and transistor 10 for buffer. The output of a buffer part is set so as to be clamped with an input current smaller than the output of the transfer impedance amplifier, and the difference voltage between a transfer impedance amplifier output voltage 14 and a buffer part output voltage 8 is impressed between the gate sources of the transistor 13 for current division. Since the output of the buffer is early clamped when an input current is increased, the transistor 13 for current division is turned on, and the saturation of a main amplifier transistor 3 is relaxed.
Bibliography:Application Number: JP19920236852