Re: Sine generator IC solution?

From: lemonjuice (exskimos_at_anonymous.to)
Date: 02/01/05 

Date: 1 Feb 2005 13:25:39 -0800

On Mon, 31 Jan 2005 14:04:48 +0000, John Woodgate
<jmw@jmwa.demon.contraspam.yuk> wrote:

>I read in sci.electronics.design that Tony Williams
><tonyw@ledelec.demon.co.uk> wrote (in
<4d35e6c072tonyw@ledelec.demon.co.
>uk>) about 'Sine generator IC solution?', on Mon, 31 Jan 2005:
>>> You're not going to do much in the way of a 10:1 tuning range in
>>> Wien bridge- fussy little high Q and amplitude unstable thing
>>> that it is.
>
>The Q of a Wien network is 1/3, not high.

Wrong ! The effective Q of a Wien bridge varies inversely with the
frequency . A typical Q at 1kHz with a 4 Mhz bandwidth is 400!