John Curl's Blowtorch preamplifier part II

[john curl]

Note, everyone, that what is useful is something both buildable and BETTER, even in theoretical approach. For example all balanced is better than single sided driver stage.
The design should be fast, low noise, and open loop LINEAR. Open loop bandwidth is debatable. Look at the topology of the AD797, for a good example.

[Steve Eddy]

Originally Posted by simon7000

Before I go further let's see if we can get agreement on a really simple circuit.

Pavel, Wavey, Scott, SY and anyone else interested, would you each please post an answer to what is the power dissipated in the resistor in the attached circuit?

10 volts what? Peak? RMS? Average? Peak to peak?

se

[john curl]

Well back to business: I wish that I had a better schematic maker. It would be easier to show the evolution of an electronic gain block, with pictures.

[miklos]

Originally Posted by morinix

For parts one and two together it's been 6 years, 7 months, 15 days As John says, go and read the first few 100 posts in part one.

Last he said the first 80 pages, you save 20

[miklos]

Originally Posted by Wavebourn

I think, the question should start from what the market would prefer: an analog of a famous opamp, or an opamp that would beat the famous opamp, or a preamp that will beat preamps that used that famous opamp?

...or just one without a ton of gain and a ton of NFB.

[morinix]

Originally Posted by miklos

Last he said the first 80 pages, you save 20

I don't know just start reading from the top 'till the nuggets show

[Wavebourn]

Originally Posted by miklos

...or just one without a ton of gain and a ton of NFB.

...or the one with praised name, in a praised box, with praised components, without things that believed to "compromise" the sound.

[simon7000]

Originally Posted by Steve Eddy

10 volts what? Peak? RMS? Average? Peak to peak?

se

RMS. Average would be zero. Peak would be noted. There really are standard conventions.

[Steve Eddy]

Originally Posted by simon7000

RMS. Average would be zero. Peak would be noted. There really are standard conventions.

Average would be zero? Far as I'm aware, the average of 10 VRMS is 8.99 V.

se

[bcarso]

Originally Posted by Steve Eddy

Average would be zero? Far as I'm aware, the average of 10 VRMS is 8.99 V.

se

Yes; the a.c. average is 2/pi times the peak value, the a.c. rms value 2^(-1/2) times the peak value.

And, actually, most simulators have generators that require specifying the peak value.

Of course, in the absence of an offset, the average d.c. value over an integer number of cycles is zero.