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Re: Fixed Bias v. Cathode Bias [message #9075 is a reply to message #9074]

Sun, 17 July 2005 18:44

Wayne Parham
Messages: 18691
Registered: January 2001

Illuminati (33rd Degree)

Get an oscilloscope and your problem will be solved. You will see a visual representation of the signal. DC is like an offset for the AC component. If the DC level is 10 volts, the average AC level is shifted 10 volts from where it would be if the DC level was 0. The scope will let you see this, and it will become intuitive for you.

Here's another thing to visualize that might help you. Picture a swimming pool, only half full. So the surface is 3 feet down from the edge. Throw a rock in and ripples ride on the surface. Now pour in some water to fill the pool. It is now 3 feet higher. Throw a rock in the pool and the same ripples appear. They're the same height (amplitide) and the same rate (frequency). The only thing that's changed is the height of the surface of the pool, it's now 3 feet higher. That's the way an AC component rides on a DC component of a signal.

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[Message index]

		Fixed Bias v. Cathode Bias By: Manualblock on Sat, 16 July 2005 13:43
		Re: Fixed Bias v. Cathode Bias By: Forty2wo on Sat, 16 July 2005 19:46
		Re: Fixed Bias v. Cathode Bias By: Thermionic on Sat, 16 July 2005 21:25
		Re: Fixed Bias v. Cathode Bias By: Manualblock on Sun, 17 July 2005 09:16
		Re: Fixed Bias v. Cathode Bias By: Forty2wo on Sun, 17 July 2005 16:08
		Re: Fixed Bias v. Cathode Bias By: Manualblock on Sun, 17 July 2005 16:09
		Re: Fixed Bias v. Cathode Bias By: Forty2wo on Sun, 17 July 2005 16:27
		Re: Fixed Bias v. Cathode Bias By: Manualblock on Sun, 17 July 2005 17:48
		Re: Fixed Bias v. Cathode Bias By: Wayne Parham on Sun, 17 July 2005 18:44
		Re: Fixed Bias v. Cathode Bias By: Manualblock on Sun, 17 July 2005 20:01
		Re: Fixed Bias v. Cathode Bias By: Thermionic on Sun, 17 July 2005 20:52
		Re: Fixed Bias v. Cathode Bias By: Manualblock on Mon, 18 July 2005 06:54
		Re: Fixed Bias v. Cathode Bias By: Thermionic on Mon, 18 July 2005 09:34
		Tube basics By: Forty2wo on Mon, 18 July 2005 11:51
		Re: Tube basics By: Manualblock on Mon, 18 July 2005 13:19
		Re: Fixed Bias v. Cathode Bias By: Wayne Parham on Mon, 18 July 2005 05:43
		Re: Fixed Bias v. Cathode Bias By: Manualblock on Sun, 17 July 2005 09:11
		Re: Fixed Bias v. Cathode Bias By: Wayne Parham on Sun, 17 July 2005 11:31
		Re: Fixed Bias v. Cathode Bias By: Manualblock on Sun, 17 July 2005 11:55
		Re: Fixed Bias v. Cathode Bias By: Forty2wo on Sun, 17 July 2005 15:14
		Re: Fixed Bias v. Cathode Bias By: Manualblock on Sun, 17 July 2005 16:08

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