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A Novel Low Noise Regenerative Divide-by-Four Circuit



A G. Sen gupta, F L. Walls


We discuss a novel design of a self starting regenerative divider that permits division by 3, 4, 5, 6 ... instead of the usual 2. This is accomplished by having the loop oscillate simultaneously at two different frequencies, e. g., at f/4 and 3f/4. A prototype of the divide- by-four circuit has been constructed for an input frequency of 400 MHz. This divider exhibits very low phase noise L(l kHz)= -16ldBc/Hz and L(lOO kHz)= -169 dBc/Hz, , which is at least 8 dB lower than its constituent parts. Simple modifications of the feedback loop of the prototype enabled it to divide by 3, 5 and 8. Operation at divide by 10 appears feasible.
Proceedings Title
2002 IEEE Intl. Freq. Cont. Symp.
Conference Dates
May 28-31, 2002
Conference Location
New Orleans, LA, US
Conference Title
Proc. 2002 IEEE Intl. Freq. Cont. Symp.


Sen gupta, A. and Walls, F. (2002), A Novel Low Noise Regenerative Divide-by-Four Circuit, 2002 IEEE Intl. Freq. Cont. Symp. , New Orleans, LA, US, [online], (Accessed June 21, 2024)


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Created December 31, 2001, Updated October 12, 2021