Analysis of Transistorized Logarithmic Amplifier

트랜지스터 대수증폭기의 해석

Detailed analysis has been developed concerning the transfer function and stability condition of the logarithmic amplifier using a common emitter transistor as a feed-back element. The analysis shows that input current vs output voltage transfer characteristics is accurately ogarithmic through entire operating current, and the time constant depends on input capcitance and collector-emitter equivalent resistance. Also the minimum value of imput capacitance required to stabilize the system is derived.

하이브리드-π 등가회로를 사용하여 공통 에미터 트랜지스타를 궤환소자로 하는 대수증폭기의 전달함수와 안정에 필요한 입력용량 C1의 최소치를 유도하였다.