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What does the h stand for in the word mother?
the transistor gain is expressed in abrivation hfe. my question is that which are the words the hfe stand for
How does using a transistor with a different beta affect the operation of the common emitter amplifier?
Gain, in the common emitter amplifier, is beta (hFe) or collector resistance divided by emitter resistance, whichever is less. Substituting a different beta (hFe) transistor will affect gain, if hFe is less, or increase stability and design margin, if hFe is greater.
What is the HFE for good transistors?
A: HFE is meaning less uunless current is specified. For a switch force gain of 10 for an amplifier at low level maybe 100 for the same transistor.
How do you read the hfe scales in the analog multimeter?
Hfe is an empirical value it means nothing unless a load is considered. the meter probably does not provide the proper loading so why measure it?
How emitter bypass resistor stabilizes the amplifier against temperature?
In the common emitter (Class A) amplifier design of a BJT, gain is collector resistance divided by emitter resistance, or hFe, whichever is less. If the emitter resistance is zero, then gain is hFe. In this configuration, gain is unstable, because hFe is temperature dependent. In fact, under certain circumstances, a BJT can experience thermal runaway. The emitter resistor (along with the collector resistor) places a limit on the expected gain of the stage. If, for example, you design with a ratio of 10, then you expect a gain of 10. If hFe is 25-100, gain is still 10.
What does Hfe stand for in electronics?
HFE is the gain of the transistor
For a given hfe calculate hfc in electronic circuits?
how to calculate the value of hfc for a given hfe
What is hfe and hfc in transistor?
I don't know about hfc, but hFE is the amplification factor by which the transistor amplifies the base current. Therefore, if hFE is 100, the base current is amplified by a factor of 100.
What does the h stand for in the word mother?
the transistor gain is expressed in abrivation hfe. my question is that which are the words the hfe stand for
Do tapirs live in the ground?
hfe
How does using a transistor with a different beta affect the operation of the common emitter amplifier?
Gain, in the common emitter amplifier, is beta (hFe) or collector resistance divided by emitter resistance, whichever is less. Substituting a different beta (hFe) transistor will affect gain, if hFe is less, or increase stability and design margin, if hFe is greater.
What is the current gain of an NPN transistor?
It depends on which transistor. Typical values of hFe range between 50 and 400. It also depends on the configuration of the circuit, with hFe being a limiting factor, and most designs providing a gain less than hFe.
How do you read the hfe scales in the analog multimeter?
Hfe is an empirical value it means nothing unless a load is considered. the meter probably does not provide the proper loading so why measure it?
What is the HFE for good transistors?
A: HFE is meaning less uunless current is specified. For a switch force gain of 10 for an amplifier at low level maybe 100 for the same transistor.
What is meant by compensation in transistor?
Temperature (assumed) compensation in a transistor is when you limit gain using resistors so that gain is dependent on resistor ratio instead of on hFe. As an example, in a common emitter, class A, configuration, with the emitter grounded, the gain is hFe. Problem is that hFe varies from device to device, and it is temperature sensistive, having a positive temperature coefficient, making thermal runaway a very real problem. You can compensate for this with an emitter resistor. In combination with the collector resistor, gain is collector resistance divided by emitter resistance, or hFe, whichever is less. If you make sure that hFe is always greater than this ratio, then the gain will be stable and predictable.
How emitter resistor provide more stabilization?
The emitter resistor places limits on the required gain, and temperature stabilizes the transistor. Without it, gain is hFe, but that is variable, temperature dependent, and subject to thermal runaway. With it, gain is predictable (collector resistor divided by emitter resistor, though limited by hFe), and temperature stabilized (so long as both resistors have the same temperature coefficient, and so long as the hFe margin is maintained).
How emitter bypass resistor stabilizes the amplifier against temperature?
In the common emitter (Class A) amplifier design of a BJT, gain is collector resistance divided by emitter resistance, or hFe, whichever is less. If the emitter resistance is zero, then gain is hFe. In this configuration, gain is unstable, because hFe is temperature dependent. In fact, under certain circumstances, a BJT can experience thermal runaway. The emitter resistor (along with the collector resistor) places a limit on the expected gain of the stage. If, for example, you design with a ratio of 10, then you expect a gain of 10. If hFe is 25-100, gain is still 10.
