2.3 放大电路的静态分析

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# 2.3 放大电路的静态分析 - PowerPoint PPT Presentation

2.3 放大电路的静态分析. 静态分析——就是通过放大电路的直流通路求解静态工作点值 I BQ 、 I CQ 、 U CEQ 等。. 直流通路. 图解法. 估算法. 求解静态工作点的常用方法. 2.3.1 图解法在放大电路静态分析中的应用. 1． 输入回路. 列写输入回路方程. V CC = i B R B + u BE. V CC = i B R B + u BE. 方程. i B. K. P. O. u BE. 直流负载线. 在 i B — u BE 坐标系中表示是一条直线. 称为输入回路的直流负载线. 三极管输入特性曲线.

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2.3 放大电路的静态分析

2.3.1 图解法在放大电路静态分析中的应用

1．输入回路

VCC=iBRB+uBE

VCC=iBRB+uBE

iB

K

P

O

uBE

iC

M

uCE

N

O

2．输出回路

VCC=iCRC+uCE

2.3.2 估算法在放大电路静态分析中的应用

VCC=iBRB+uBE

UCEQ=VCC－ICQRC