Hello all,
I am having fun playing with LTSpice and I wanted to revisit TDA7293's mute and standby circuit.
I think there are ways to improve on the original design. I might be mistaken though, so any feedback is appreciated.
Attached are simulation files and screenshots with additional information in the notes.
Essentially revised version gets rid of some parts, and adjusts values a little.
In particular, STBY time constant has been revised and now is defined by R=15K and C=33uF => 0.495s (vs old R=20k x C=10u => 0.2s)
MUTE time constant is now R=30K x C=33uF => 0.99s (vs old R=40k x C=10u => 0.4s)
Bleeder resistor is added to capacitor on the MUTE rail to speed up turn off.
I am having fun playing with LTSpice and I wanted to revisit TDA7293's mute and standby circuit.
I think there are ways to improve on the original design. I might be mistaken though, so any feedback is appreciated.
Attached are simulation files and screenshots with additional information in the notes.
Essentially revised version gets rid of some parts, and adjusts values a little.
In particular, STBY time constant has been revised and now is defined by R=15K and C=33uF => 0.495s (vs old R=20k x C=10u => 0.2s)
MUTE time constant is now R=30K x C=33uF => 0.99s (vs old R=40k x C=10u => 0.4s)
Bleeder resistor is added to capacitor on the MUTE rail to speed up turn off.
