current gain การใช้

• Another important parameter is the " common-base current gain ", ? F.
• At low frequencies, the current gain ( beta ) is at least 100.
• The circuit works the same way for all three-terminal devices with current gain.
• Collector current is approximately ? ( common-emitter current gain ) times the base current.
• NPN ) as Q1 and with a very high current gain ( ? ).
• The result for the open-loop current gain " A"
• However, this high current gain comes with several drawbacks.
• Increasing DC open-loop current gain improves the line regulation.
• The market's current gains reflect the economic recovery Wall Street expects to see this summer.
• To obtain the current gain when load current " i L " in load resistor " R"
• Current gain in the common emitter circuit is obtained from the base and the collector circuit currents.
• The common-base current gain is approximately the gain of current from emitter to collector in the forward-active region.
• The most important parameter for transistors is usually the forward current gain, h 21, in the common emitter configuration.
• Since this is a very high impedance circuit, current gain only is usually needed, with the voltage remaining constant.
• For high current gain, most of the carriers injected into the emitter base junction must come from the emitter.
• Why should they take current gains and losses when at end of the day they come out where they started?
• As they funnel out to sea, the rip currents gain force, fan out into a mushrooming slough and then dissipate.
• For a device biased at 1 mA having a current gain of 100, this evaluates to 0.26 ohms at 25 deg.
• In active mode, the ratio of the collector current to the base current is called the " DC current gain ".
• This configuration is also useful as a current buffer since it has a current gain of approximately unity ( see formulas below ).