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85. Usage of current mirror (Part-C)
The chapter explores the usage and advantages of current mirrors in electronic circuits, emphasizing their roles in amplifiers and biasing elements. It discusses the small signal model of current mirrors for both BJTs and MOSFETs, highlights their impact on the gain and mode rejection in amplifiers, and concludes with applications in differential amplifiers. The importance of current mirrors in enhancing performance parameters in various configurations is underscored throughout the text.
Sections
This section discusses the analysis of a common source amplifier, focusing on the effects of a diode-connected load and the use of a current mirror for biasing.
This section discusses the analysis of a circuit resembling a common source amplifier, focusing on the impact of current mirrors on circuit gain.
Current mirrors are effective in improving the gain of common emitter and common source amplifiers.
The application of current mirrors as biasing elements enhances the performance of both differential mode and common mode signals.
Using current mirrors can drastically reduce common mode gain, improving common mode rejection in differential amplifiers.
Current Mirror
A circuit configuration that copies current from one branch to another, maintaining a stable current output.
Common Mode Gain
The gain of a differential amplifier when the same input signal is applied to both inputs, referring to the amplifier's ability to reject noises that are common to both inputs.
Differential Amplifier
An electronic amplifier that amplifies the difference between two input voltages while rejecting any voltage common to the two inputs.
Practice Exercises
Total Questions
2
Estimated Time
4 min
Passing Score
70%
Instructions
- Read each question carefully
- You can use hints if you need help
- Complete all questions before submitting