bridged opa549 odd workings

jaudio · 31st March 2005, 06:45 AM

I bridged two opa549 with drv134 splitting the signal. The odd things are

1. powered up, it reaches 6volts then settles to 4mv

2. with input disconnected,it has a loud hiss then silent

but it works with input connected and about 5 seconds after power up

wrenchone · 31st March 2005, 07:04 AM

Circuit? If one of the IC inputs is open, it will misbehave...

jaudio · 18th April 2005, 12:29 AM

Wrenchone you were right. Thanks for the help.

31st March 2005, 06:45 AM	#1
jaudio diyAudio Member Join Date: Oct 2004	bridged opa549 odd workings I bridged two opa549 with drv134 splitting the signal. The odd things are 1. powered up, it reaches 6volts then settles to 4mv 2. with input disconnected,it has a loud hiss then silent but it works with input connected and about 5 seconds after power up

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31st March 2005, 07:04 AM	#2
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	Circuit? If one of the IC inputs is open, it will misbehave...

18th April 2005, 12:29 AM	#3
jaudio diyAudio Member Join Date: Oct 2004	Wrenchone you were right. Thanks for the help.

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