[SI-LIST] Re: How to couple noise to the PDN of oscillator
- From: steve weir <weirsi@xxxxxxxxxx>
- To: Zhangkun <zhang_kun@xxxxxxxxxx>
- Date: Wed, 14 May 2008 22:32:05 -0700
A transformer can match impedance, but your power levels will likely be
wanting. You can raise the impedance of the oscillator PDN connection
to ease this problem. You can also use an RF power amplifier.
Steve.
Zhangkun wrote:
> Dear all
>
> Now we are studying the effect of power noise on jitter. We meet a problem,
> how to couple noise to the PDN. For example, we want to couple noise of
> 25MHz into the PDN of oscillator. However there is impedance dismatch. The
> impedance of signal source is about 50ohm and that of PDN is about 0.1ohm.
> The energy would be reflected.
>
> Any advice would be helpful
>
> Best Regards
>
> Zhangkun
> 2008.5.14
>
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