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Chapter 12

Transistors

Bipolar Junction Transistor
Bipolar Junction Transistor
Transistors play a vital role in electronic circuits, enabling the functionality of amplifiers, memories, and microprocessors. Transistors can be designed ...
BJT 的配置
BJT 的配置
Bipolar junction transistors have different configurations based on the common contact. The common base configuration features a shared base terminal for ...
BJT 的工作原理
BJT 的工作原理
Consider a PNP transistor in a common-base configuration, operating in active mode. Forward biasing reduces the emitter-base potential, enabling the ...
BJT 的特点
BJT 的特点
Consider the common-emitter configuration of the BJT. The voltage and current dependencies are measured experimentally to understand the current-voltage ...
BJT 的作模式
BJT 的作模式
A bipolar junction transistor has four modes of operation, depending upon the voltage polarities at the emitter-base junction and the collector-base ...
BJT 的频率响应
BJT 的频率响应
A common-emitter amplifier's DC bias point is determined by the base-emitter voltage, base current, and collector current. The load line is determined ...
BJT 的截止频率
BJT 的截止频率
The common base configuration's current gain is constant at low frequencies of the input signal but attenuates after a specific frequency known as the ...
BJT 的开关
BJT 的开关
Consider a switching circuit that involves a sudden change in the emitter-base voltage. Initially, both the base-emitter junction and the ...
BJT 放大器
BJT 放大器
In the active region of a common emitter NPN BJT, the emitter current is the sum of the base current and the collector current. Here, the base voltage ...
BJT 放大器的小信号分析
BJT 放大器的小信号分析
Consider a BJT  transistor amplifier circuit operating in its active region to provide linear amplification. The total instantaneous base-emitter ...
Field Effect Transistor
Field Effect Transistor
A field effect transistor is a three-terminal unipolar device comprising a gate, drain, and source terminal. Charge carriers flow from the source to the ...
JFET的特性
JFET的特性
The output characteristics of a JFET describe the relationship between the drain current and the drain-source voltage at various levels of gate-source ...
FET 偏置
FET 偏置
A junction field effect transistor is used in electronic circuits to control electrical currents. JFETs consist of an N-type or P-type silicon bar ...
MOS 电容器
MOS 电容器
MOS capacitors have three layers: the bottom layer is a semiconductor substrate, the middle is an insulating layer, and the top metal layer is the gate ...
MOSFET (微粒半导体
MOSFET (微粒半导体
The Metal-Oxide-Semiconductor Field-Effect Transistor, or MOSFET is a semiconductor device with three terminals: the Source, the Drain, and the Gate and ...
MOSFET 的特性
MOSFET 的特性
The essential parameters of MOSFETs include the channel length, the channel width, the oxide thickness, the junction depth, and the substrate doping. With ...
MOSFET:增强模式
MOSFET:增强模式
The two modes of p- and n-channel MOSFETs are enhancement and depletion. Enhancement mode MOSFETs are typically off at zero gate-source voltage, meaning ...
MOSFET:耗尽型
MOSFET:耗尽型
Depletion-mode MOSFETs are already ON without a gate bias but need a gate-source voltage to switch OFF. They function like JFETs, where the drain-source ...
MOSFET 放大器
MOSFET 放大器
The MOSFET operates as a voltage-controlled current source in its active region, where the gate-to-source voltage regulates the drain current. This ...
MOSFET 放大器的小信号分析
MOSFET 放大器的小信号分析
Consider a MOSFET transistor amplifier circuit operating in its active region to provide linear amplification. The total instantaneous gate-to-source ...
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