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Other Stuff => Archived Manufacturer Circles => Hagerman Technology => Topic started by: Brinkman on 4 Mar 2013, 12:59 am

Title: Max allowable DC offset into Clarinet
Post by: Brinkman on 4 Mar 2013, 12:59 am

I am currently building a new transimpedance phono stage that does not require coupling capacitors due to the use of low offset op amps (OPA627BPs). However, there still will be some DC offset at the output. What is the safest allowable DC offset allowed into the input of the Clarinet before one should install the optional input capacitors (C302 L&R)?

Thanks.

Title: Re: Max allowable DC offset into Clarinet
Post by: hagtech on 5 Mar 2013, 03:47 am

It should handle at least +/-0.1V.  Probably way more.  There is always the option of adding the input caps in the CLARINET.

jh

Title: Re: Max allowable DC offset into Clarinet
Post by: Brinkman on 5 Mar 2013, 05:31 am

Fantastic.

I had a hard time researching the effects of DC offset on common cathode stages, but assumed the the net consequence was a slight grid bias offset. Either way, I'm expecting a residual offset much less than 20mV.

Thanks Jim.