To: | Andy Talbot <[email protected]> |
---|---|
Subject: | Re[4]: LF: Automatic variometer circuit |
From: | Chris Wilson <[email protected]> |
Date: | Sat, 31 Oct 2015 17:00:25 +0000 |
In-reply-to: | <CAA8k23T9uyZs_dJ1t6_vs4eKF_381szkF-wTz-iJaDcCqdkbaQ@mail.gmail.com> |
Organization: | Gatesgarth Developments |
References: | <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]> <CAA8k23T9uyZs_dJ1t6_vs4eKF_381szkF-wTz-iJaDcCqdkbaQ@mail.gmail.com> |
Reply-to: | [email protected] |
Sender: | [email protected] |
Hello Andy, Saturday, October 31, 2015 Is this what you mean? http://www.chriswilson.tv/phase-driver.jpg Thanks. > Actually, looking again at the circuit again, it is not necessary > to use an opamp in that position to define the mid rail for the > comparator reference. Just two equal; value resistors and > oneelectrolytic decoupling the junction to ground (Definitely not > two caps to top and bottom in the original configuration shown ... think > about it...) > You only need an opamp to define a stiff mid rail voltage where > there is likely to be any significant current draw. Or many stages > need to be referenced to it - such as a multi stage filter. For > single stage configurations, just two resistors and a bit of decoupling is > enough -- Best regards, Chris mailto:[email protected] |
<Prev in Thread] | Current Thread | [Next in Thread> |
---|---|---|
|
Previous by Date: | LF: Re: 630 METRES NOW, Fausto Coletti |
---|---|
Next by Date: | Re: LF: Re: 630 METRES NOW, mal hamilton |
Previous by Thread: | Re: Re[2]: LF: Automatic variometer circuit, Andy Talbot |
Next by Thread: | Re: Re[4]: LF: Automatic variometer circuit, Andy Talbot |
Indexes: | [Date] [Thread] [Top] [All Lists] |