At the moment there are a couple of Diamond buffer pcb's, my QRV-05 , Glassman's, AMZ-FX's and even more (somebody may fresh up my memory). All these implementations are different. 100% SMD, 90% SMD, 0% SMD, with cascodes and without.
First: I have absolutely no need for a diamond buffer
Second: This small deisgn is fun and easy to make good
Third: This is a small project, I like that.
Fourth: I feel like doing a good nice looking hole mounted pcb.
The design will be exactly as my QRV_05 but with both positive and negative current sources at the input, according to Bruno's input in this matter.
Design goal:
* High performance, best as possible, therefor usage of cascodes.
* Use as few different parts as possible
* All resistors 400 mils between pins (or do you prefer an even smaller pcb with standing resistors?)
* Three pairs of output transistors, consisting of TO92 types
* Pcb will be in a 4 pcs. panel.
How big may the pcb be? What is the limit?
What do you say?
First: I have absolutely no need for a diamond buffer
Second: This small deisgn is fun and easy to make good
Third: This is a small project, I like that.
Fourth: I feel like doing a good nice looking hole mounted pcb.
The design will be exactly as my QRV_05 but with both positive and negative current sources at the input, according to Bruno's input in this matter.
Design goal:
* High performance, best as possible, therefor usage of cascodes.
* Use as few different parts as possible
* All resistors 400 mils between pins (or do you prefer an even smaller pcb with standing resistors?)
* Three pairs of output transistors, consisting of TO92 types
* Pcb will be in a 4 pcs. panel.
How big may the pcb be? What is the limit?
What do you say?
Well, I got to ask this...
What are they good for and what is their advantage over other solutions? I read about headphone amps, can you descibe how they compare to other amps?
thanks
What are they good for and what is their advantage over other solutions? I read about headphone amps, can you descibe how they compare to other amps?
thanks
First of all: It's not an amplifier, OK an amplifier with the gain of nearly 1, 0.95-0.999. The main usage is to have it between an opamp or some other kind of amplifier with a weak output stage and a rather heavy load. The buffer can be used within or outside a feedback loop. The buffer has also current sources at the input for creating class A mode of the opamp.
This was on old thread but is there any interest for a group buy today? Back then the pcb was double sided, now the pcb has four layers and the size is nearly half the size.
Documentation
Documentation
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tinitus, component kit is out of the question because it consumes a lot time and the parts are cheap and available for everyone.
tempted by the possible 1Mohm impedance
Input impedance: >1 Mohms, pullup, pulldown resistors not included.
Output impedance: 2.5 ohms
Input impedance: >1 Mohms, pullup, pulldown resistors not included.
Output impedance: 2.5 ohms
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