LOW INPUT IMPEDANCE AMPLIFIER

摘要

PROBLEM TO BE SOLVED: To provide an amplifier that amplifies a current signal coming from any of signal inputs Ini (i=1 to N) before the signal is available at output terminals OUTi (i=1 to P). SOLUTION: An amplifier CD is provided with a 1st transistor(TR) T1 and a 2nd TR T2 connected in series between a power terminal VCC and a ground terminal. The transfer terminal of the 1st TR T1 is connected to the bias terminal of the 2nd TR T2 to form an input to the amplifier CD, and the bias terminal of the 1st TR T1 is connected to a reference potential terminal. The amplifier CD has a low input impedance and a low common-mode output level.