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transistor hybrid parameter

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  • Transistor models — Transistors are complicated devices. In order to ensure the reliable operation of circuits employing transistors, it is necessary to scientifically model the physical phenomena observed in their operation using transistor models. There exists a… …   Wikipedia

  • Hybrid-pi model — The hybrid pi model is a popular circuit model used for analyzing the small signal behavior of transistors. The model can be quite accurate for low frequency circuits and can easily be adapted for higher frequency circuits with the addition of… …   Wikipedia

  • Bipolar junction transistor — BJT redirects here. For the Japanese language proficiency test, see Business Japanese Proficiency Test. PNP …   Wikipedia

  • Cascode — The cascode is a two stage amplifier composed of a transconductance amplifier followed by a current buffer. Compared to a single amplifier stage, this combination may have one or more of the following advantages: higher input output isolation,… …   Wikipedia

  • Negative feedback amplifier — Figure 1: Ideal negative feedback model A negative feedback amplifier (or more commonly simply a feedback amplifier) is an amplifier which combines a fraction of the output with the input so that a negative feedback opposes the original signal.… …   Wikipedia

  • Widlar current source — A Widlar current source is a modification of the basic two transistor current mirror that incorporates an emitter degeneration resistor for only the output transistor, enabling the current source to generate low currents using only moderate… …   Wikipedia

  • Common collector — Figure 1: Basic NPN common collector circuit (neglecting biasing details). In electronics, a common collector amplifier (also known as an emitter follower or BJT voltage follower) is one of three basic single stage bipolar junction transistor… …   Wikipedia

  • Operational amplifier — A Signetics μa741 operational amplifier, one of the most successful op amps. An operational amplifier ( op amp ) is a DC coupled high gain electronic voltage amplifier with a differential input and, usually, a single ended output.[1] An op amp… …   Wikipedia

  • Current mirror — A current mirror is a circuit designed to copy a current through one active device by controlling the current in another active device of a circuit, keeping the output current constant regardless of loading. The current being copied can be, and… …   Wikipedia

  • Network analysis (electrical circuits) — Linear Network Analysis Elements …   Wikipedia

  • Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …   Wikipedia

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