Equivalent circuit, Features, Calculations, Solved Example Problems | Multistage Amplifiers
Subject and UNIT: Electron Devices and Circuits: Unit IV: Multistage and Differential Amplifiers
• Assuming all capacitors arbitrarily large and act as a short circuit for a.c. signal we can draw h-parameter equivalent circuit for CE-CE cascade amplifier, as shown in Fig. 8.1.14.
Equivalent circuit, Solved Example Problems
Subject and UNIT: Electron Devices and Circuits: Unit IV: Multistage and Differential Amplifiers
• In practice, we need amplifier which can amplify a signal from a very weak source such as a microphone, to a level which is suitable for the operation of another transducer such as loudspeaker. This is achieved by cascading number of amplifier stages, known as multistage amplifier or Casceded amplifier.
Electron Devices and Circuits
Subject and UNIT: Electron Devices and Circuits: Unit IV: Multistage and Differential Amplifiers
Electron Devices and Circuits: Unit IV: Multistage and Differential Amplifiers : Syllabus, Contents
MOSFET Amplifier | Electron Devices and Circuits
Subject and UNIT: Electron Devices and Circuits: Unit III: (b) MOSFET Amplifier
Electron Devices and Circuits: Unit III: (b) MOSFET Amplifier : University Questions with Answers (Long Answered Questions)
MOSFET Amplifier | Electron Devices and Circuits
Subject and UNIT: Electron Devices and Circuits: Unit III: (b) MOSFET Amplifier
Electron Devices and Circuits: Unit III: (b) MOSFET Amplifier : Two Marks Questions with Answers
Solved Example Problems | MOSFET Amplifier
Subject and UNIT: Electron Devices and Circuits: Unit III: (b) MOSFET Amplifier
• Fig. 7.7.1 shows the CS MOSFET amplifier. Its gain falls at low frequency due to the effect of CC1 ,Cs and CC2- Its gain falls at high frequency due to the effect of Cgs and Cgd
Subject and UNIT: Electron Devices and Circuits: Unit III: (b) MOSFET Amplifier
• Gate capacitance : It is a parallel-plate capacitance formed by a gate electrode with the channel, with the oxide layer acts as a capacitor dielectric. It is denoted as Cox.
Equivalent circuit, Solved Example Problems | MOSFET Amplifier
Subject and UNIT: Electron Devices and Circuits: Unit III: (b) MOSFET Amplifier
• Fig. 7.5.1 shows the common-drain amplifier circuit. It is also known as grounded drain amplifier.
Equivalent circuit, Solved Example Problems | MOSFET Amplifier
Subject and UNIT: Electron Devices and Circuits: Unit III: (b) MOSFET Amplifier
• In this section, we will see the common-source amplifier. We will analyze several basic common-source circuits and will determine small-signal voltage gain and input and output impedances.
Equivalent circuit, Solved Example Problems
Subject and UNIT: Electron Devices and Circuits: Unit III: (b) MOSFET Amplifier
• The output voltage is also a combination of d.c. and a.c. values. The time-varying output signal is the time-varying drain-to-source voltage, or Vo = Vds = - idRD
Subject and UNIT: Electron Devices and Circuits: Unit III: (b) MOSFET Amplifier
• The time-varying signal source in Fig. 7.1.1 (a) generates a time-varying component of the gate-to-source voltage.
Subject and UNIT: Electron Devices and Circuits: Unit III: (b) MOSFET Amplifier
• Fig. 7.1.1 shows n-channel, enhancement mode MOSFET common-source circuit with a time-varying (a.c.) voltage source in series with the d.c. source. We assume the time-varying input signal is sinusoidal.