Talk:Frequency divider

How to make a divider using the smallest number of transistors? On a SiGe BiCMOS process, you have to run a npn transistor at a high current to get the frequency response of which the process is capable. So I need to minimize the number of transistors to minimize the power dissipation. Also, the process uses Vcc=2.5volt max, another feature of your typical SiGe process, so there's another limitation of the number of transistors stacked.

Talk

Citation Needed, Regenerative frequency divider
"... the amplifier gain at the half frequency must be greater than unity. The phase shift must also be an integer multiple of 2pi." should probably be suppressed.

If you are trying to make a oscillator out of a linear amplifier then, at the frequency of oscillation, the loop gain must be greater than unity and the phase must be an integer multiple of 2pi. In fact, the oscillator finds the frequency at which the phase is a multiple of 2pi. If you adjust the components, the frequency changes. If you want some particular precise frequency you have to adjust the components very carefully. The Regenerative frequency divider is a highly non-linear circuit. Phase in the sense of the linear amplifier doesn't mean anything. You don't have to carefully tune the filter. You can vary the filter and as long as you don't vary it too much, the output frequency won't change. The filter is usually a band pass filter.Constant314 (talk) 02:12, 17 May 2012 (UTC)
 * I am removing this unsourced material. The citation request has been on the material over a year.Constant314 (talk) 03:02, 30 October 2013 (UTC)

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