Tham khảo tài liệu 'chapter 5transistor circuits: objectives', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Funda Integra JAMES COX itd edition OFl IVIAR ---- -------- T1 lOM- .ON HAHN NG CHAPTER 5 Transistor Circuits copyright 2002 Delmar Thomson Learning OBJECTIVES Describe and Analyze Need for bias stability Common Emitter Amplifier Biasing RC-coupled Multistage Amplifiers Direct-Coupled Stages Troubleshooting copyright 2002 Delmar Thomson Learning Funda Integra JAMES COX itd edition OFl IVIAR ---- -------- T1 lOM- .ON HAHN NG Introduction The DC bias values for Vce and Ic are collectively called the Q-Point . Because a transistor s beta varies 2 to 1 or more from device to device biasing circuitry needs to be designed so that the Q-point is not a function of beta. Likewise the gain of a transistor amplifier should not depend on beta. Gain should be set by the values of external components such as resistors. copyright 2002 Delmar Thomson .
