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Match Transistor Pairs Quickly using this Circuit ...
https://www.homemade-circuits.com/match-transistor-pairs-quickly-using-this-circuit/#:~:text=A%20pair%20of%20transistors%20will%20be%20%E2%80%9Cmatched%E2%80%9D%20if,transistors%20for%20applications%20like%20differential%20amplifiers%20or%20thermistors.
Matched pair transistors | Nexperia
https://www.nexperia.com/products/bipolar-transistors/special-feature-transistors/matched-pair-transistors/
Audio, Dual-Matched NPN Transistor Data Sheet …
https://www.analog.com/media/en/technical-documentation/data-sheets/SSM2212.pdf
The SSM2212 is a dual, NPN-matched transistor pair that is specifically designed to meet the requirements of ultralow noise audio systems. With its extremely low input base spreading resistance (rbb' is typically 28 Ω) and high current gain (h FE typically exceeds 600 at I C = 1 mA), the SSM2212 can achieve outstanding signal-to-noise ratios.
Super Matched Bipolar Transistor Pair Sets New …
https://www.ti.com/lit/an/snoa626b/snoa626b.pdf
Matched bipolar transistor pairs are a very powerful design tool, yet have received less and less attention over the last few years. This is primarily due to the proliferation of high-performancemonolithic circuits that are replacing many designs previously implemented with discrete components. State-of-the-art
Matching Power and Driver Transistors - The Audio Pages ...
https://sound-au.com/transistor-matching.htm
Matched transistors will rarely give you 'better sound' (whatever that is supposed to mean). In general, distortion will be almost completely unaffected, and there is no influence on frequency response or transient response. What you will get (for paralleled devices) is greater reliability, because the transistors will share the current more equally.
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