What is the difference between bd139 and bd140?
I brought bd140 transistors in Bitfoic Electronics. A current buffer circuit comprised of pairs of BD139 and BD140 was designed and simulated by me. Instead of raising the voltage, this circuit raises the current. The THD distortion increased from 0.15% to 2% after I switched to the newer "G" variants of these transistors, the BD139G and BD140G. I need to adjust the collector's resistances in order to lower this distortion percentage. Therefore, it would appear that switching to the "G" versions of these transistors is not a simple process and necessitates the aforementioned adjustments. The spice data utilized in the different transistors as they are introduced into the simulator is enclosed.
Added 2 years, 4 months ago.
1 Answer
Hi there,
Thanks for reaching out. However, I'm not totally sure what is your exact question based on the content of your question aside from asking for the difference between BD139 and BD140.
The BD139 is an NPN-type transistor while the BD140 is a PNP-type transistor. In terms of package and mechanical data, they have the same information and nothing's different. The main difference between the two is mostly within their electrical characteristics(voltage and current).
Can you please let us know what is your exact question regarding these parts mentioned?
Thanks!
Answered 2 years, 4 months ago.
