AW(Magnus): [sdiy] analogue phase modulation

[harrybissell at copper.net]

The other hidden feature is that the opamp
will clip ay some constant level... you NEED
a really stable power supply here

H^) harry

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>
>
>---- Original Message ----
>From: cfmd at bredband.net
>To: jhaible at debitel.net
>Subject: Re: AW(Magnus): [sdiy] analogue phase modulation
>Date: Fri, 12 Jan 2007 06:17:58 +0100 (CET)
>
>>From: "JH." <jhaible at debitel.net>
>>Subject: Re: AW(Magnus): [sdiy] analogue phase modulation
>>Date: Thu, 11 Jan 2007 21:23:43 +0100
>>Message-ID: <000901c735be$6d8b42d0$0200a8c0 at jhsilent>
>>
>>> I think there's a similar circuit in Electronotes, used as a
>waveform 
>>> animator - I'll check the resistor values there.
>>
>>I haven't looked in the Electronotes (at all) so I doubt it will do
>any good
>>to check for a similar circuit either. This one came from my
>imagination.
>>Just do the math and it should be obvious to you. The +/- 15V output
>of the
>>op-amp needs to be dampend by the 300 k resistor to match the +/- 5V
>signal
>>through a 49.9 k resistor. The hidden feature is the assumed +/- 15V
>power and
>>assumed rail-to-rail signal.
>>
>>Cheers,
>>Magnus