Hi Everybody,
It's a wonderful day that I have success in my first ever unity-gain buffer amplifier modular design and testing. I spend more then half a year to do research, circuit design, simulation, pcb design, etc. After a quick testing using AudioPrecision system two cascade (2322), I found it's preformance is very good. The modular has unmatch preformance in IMD,THD+N,niose, testing 😎 You know, in the CCIF standard IMD vs amplitude testing, when input signal over -43dBV, IMD products can not be measure by AP SYSTEM TWO(2322)!!! 😎 😎 And got just around 0.0002% as CCIF IMD testing result when input signal level down to -50dBV!
For spectrum of THD residual testing @ 1KHz 0dBV input, all of the distortion products were lower then -120dB!!! 😎
And output noise testing, when the input of buffer amp modular was connect to ground through a 50ohm resistor, the output noise just around 1.5uV!
DC offset, lower lower then 1mV! When input short to ground by a 50ohm resistor. And lower then 5mV,when input port connect to ground through a 100k resistor!
Haha~~~~~~~~~~~ I wanna show it to you guys, because I think I really done a good job! 😀 All of these were not simulation on pc, they are true! They are real testing result!!!!!!!!!
😎
I think There are NONE commercial open-loop unity-gain buffer amp can reach this preformance! The following pictures will show you the testing result, the modular, and the evaluation board......
Result of spectrum of THD residual testing @ 1KHz 0dBV input
CCIF IMD vs amplitude testing
SMPTE IMD vs amplitude
THD+N vs frequency
The buffer amp modular
Evaluation board
Close view and size of modular
It's a wonderful day that I have success in my first ever unity-gain buffer amplifier modular design and testing. I spend more then half a year to do research, circuit design, simulation, pcb design, etc. After a quick testing using AudioPrecision system two cascade (2322), I found it's preformance is very good. The modular has unmatch preformance in IMD,THD+N,niose, testing 😎 You know, in the CCIF standard IMD vs amplitude testing, when input signal over -43dBV, IMD products can not be measure by AP SYSTEM TWO(2322)!!! 😎 😎 And got just around 0.0002% as CCIF IMD testing result when input signal level down to -50dBV!
For spectrum of THD residual testing @ 1KHz 0dBV input, all of the distortion products were lower then -120dB!!! 😎
And output noise testing, when the input of buffer amp modular was connect to ground through a 50ohm resistor, the output noise just around 1.5uV!
DC offset, lower lower then 1mV! When input short to ground by a 50ohm resistor. And lower then 5mV,when input port connect to ground through a 100k resistor!
Haha~~~~~~~~~~~ I wanna show it to you guys, because I think I really done a good job! 😀 All of these were not simulation on pc, they are true! They are real testing result!!!!!!!!!
😎 I think There are NONE commercial open-loop unity-gain buffer amp can reach this preformance! The following pictures will show you the testing result, the modular, and the evaluation board......
Result of spectrum of THD residual testing @ 1KHz 0dBV input
An externally hosted image should be here but it was not working when we last tested it.
CCIF IMD vs amplitude testing
An externally hosted image should be here but it was not working when we last tested it.
SMPTE IMD vs amplitude
An externally hosted image should be here but it was not working when we last tested it.
THD+N vs frequency
An externally hosted image should be here but it was not working when we last tested it.
The buffer amp modular
An externally hosted image should be here but it was not working when we last tested it.
Evaluation board
An externally hosted image should be here but it was not working when we last tested it.
Close view and size of modular
An externally hosted image should be here but it was not working when we last tested it.
