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Ultra-low-noise regenerative frequency divider
By: Howe, D.A.; Desalvo, J.A.; Lirette, D.; Barnes, C.; Nelson, C.W.; Hati, A.;
2012 / IEEE
Description
This item was taken from the IEEE Periodical ' Ultra-low-noise regenerative frequency divider ' We designed ultra-low-noise regenerative divideby-2 circuits that operate at input frequencies of 10, 20, and 40 MHz. We achieved output-referred single-sideband residual phase noise equal to -164 dBc/Hz at 10 Hz offset and estimated residual Allan deviation, �sub>y(� less than 3 �10-15�sup>-1 for a single divider, which is, to our knowledge, the lowest noise of any divider ever reported at these frequencies. To measure such a low noise, we also built a cross-spectrum measurement system that has a noise floor of -175 dBc/Hz at 10 Hz offset from the carrier frequency. The low noise of the divider and the measurement system are achieved by using custom-built mixers/phase detectors that use 2N2222A bipolar junction transistors (BJTs) in a conventional double-balanced diode ring.
Related Topics
Phase Noise
Frequency 10 Hz
Ultra-low-noise Regenerative Frequency Divider
Output-referred Single-sideband Residual Phase Noise
Residual Allan Deviation
Cross-spectrum Measurement System
Custom-built Mixer
Phase Detector
2n2222a Bipolar Junction Transistors
Bjt
Double-balanced Diode Ring
Frequency 10 Mhz
Frequency 20 Mhz
Frequency 40 Mhz
Phase Noise
Mixers
Noise Measurement
Frequency Measurement
Phase Measurement
Mixers (circuits)
Measurement Systems
Frequency Dividers
Bipolar Transistors
Semiconductor Diodes
Fields, Waves And Electromagnetics
Engineering
Ultra-low-noise Regenerative Divide-by-2 Circuit