Passband Voltage & Transistor Cut-Off Frequency Explained

[amaresh92]

can anyone tell me what is pass band voltage?what do we meant by cut off frequency of a transistor?
advanced thanks.

 

[schip666!]

As a guess I'd say the "pass band voltage" is the output signal strength of a filter circuit at the frequency that is "passed through", as compared to frequencies that are blocked by the filter. More context would help to refine this...

"cut off frequency" usually specifies the highest frequency at which a transistor will operate. Above that it will not amplify the signal very well.

 

[madmike159]

As a guess I'd say the "pass band voltage" is the output signal strength of a filter circuit at the frequency that is "passed through", as compared to frequencies that are blocked by the filter. More context would help to refine this...

Yea, a pass band filter let's through a range of frequencies, so you would see higher voltages coming through at these frequencies.

"cut off frequency" usually specifies the highest frequency at which a transistor will operate. Above that it will not amplify the signal very well.

If you look at a data sheet for a transistor it will normaly show a log graph with a line on it. Where the line begins to drop is the cut off frequency.Hope this helps.