| Author(s): |
Corey A. Barnes; Archita Hati; Craig W. Nelson; David A. Howe; |
| Title: |
5 MHz Phase Detector With Low Residual Flicker |
| Published: |
September 15, 2011 |
| Abstract: |
The measurement of close-to carrier phase modulation (PM) noise of state-of-the-art oscillators is always challenging. Quite often the residual noise of the phase detector used in these measurements is the source of difficulty. In particular at Fourier offset frequencies between 5 and 100 Hz, oscillator noise has a slope of f- -3 and may be lower than the mixer noise floor which follows a slope of f- -1. A conventional double balanced mixer (DBM) using 2N2222A transistors as the non-linear components of a diode ring is constructed for use as a phase detector. Residual single-sideband PM noise measurements at 5 MHz for this device have shown an extremely low flicker noise floor of L(10 Hz) = -165 dBc/Hz. The low noise floor of this mixer makes the device ideal for use as a detector for PM noise measurement systems. Implementing this mixer design in a dual-channel measurement system, a cross-correlated PM noise floor of better then L(10Hz) = -170 dBc/Hz is expected. These features set this DBM design apart from other mixers used for phase detection at 5 MHz. |
| Citation: |
Electronics Letters |
| Volume: |
47 |
| Issue: |
19 |
| Pages: |
pp. 1 - 2 |
| Keywords: |
Flicker noise;mixers;phase detector;phase noise |
| Research Areas: |
Physics |
| PDF version: |
 Click here to retrieve PDF version of paper (169KB) |
