Advanced

A phase-shifting PLL frequency offseter

Yuan, Jiren LU (1988) In Journal of Physics E: Scientific Instruments 21(2). p.151-154
Abstract
A phase-shifting PLL frequency offsetter has been developed for use in the comparison of near-equal frequencies by phase-time recordings. The input frequency is shifted by means of a phase-shifting phase-locked loop. Time-linear phase shifting is simply obtained by inserting an RC link in the loop. Continuous operation is obtained by polarity switching of the capacitor and the phase detector at suitable phase values. An experimental circuit working around 114 kHz is presented, providing offset frequencies in the range 1 mHz to 10 Hz. The circuit uses eight analogue ICs. The output frequency stability depends on the input frequency stability, the fractional frequency offset and the stability of the analogue circuit, and is, for the circuit... (More)
A phase-shifting PLL frequency offsetter has been developed for use in the comparison of near-equal frequencies by phase-time recordings. The input frequency is shifted by means of a phase-shifting phase-locked loop. Time-linear phase shifting is simply obtained by inserting an RC link in the loop. Continuous operation is obtained by polarity switching of the capacitor and the phase detector at suitable phase values. An experimental circuit working around 114 kHz is presented, providing offset frequencies in the range 1 mHz to 10 Hz. The circuit uses eight analogue ICs. The output frequency stability depends on the input frequency stability, the fractional frequency offset and the stability of the analogue circuit, and is, for the circuit presented, a few parts in 1010 at an offset frequency of 0.01 Hz if the input frequency is based on a Cs or Rb source. The method can be used for frequencies up to the MHz range. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physics E: Scientific Instruments
volume
21
issue
2
pages
151 - 154
publisher
Institute of Physics and the Physical Society
external identifiers
  • scopus:0023964673
ISSN
0022-3735
DOI
10.1088/0022-3735/21/2/004
language
English
LU publication?
no
id
3070b032-2b36-4ed5-884a-75f675246b90 (old id 1758999)
date added to LUP
2011-01-04 18:28:21
date last changed
2017-01-01 07:48:48
@article{3070b032-2b36-4ed5-884a-75f675246b90,
  abstract     = {A phase-shifting PLL frequency offsetter has been developed for use in the comparison of near-equal frequencies by phase-time recordings. The input frequency is shifted by means of a phase-shifting phase-locked loop. Time-linear phase shifting is simply obtained by inserting an RC link in the loop. Continuous operation is obtained by polarity switching of the capacitor and the phase detector at suitable phase values. An experimental circuit working around 114 kHz is presented, providing offset frequencies in the range 1 mHz to 10 Hz. The circuit uses eight analogue ICs. The output frequency stability depends on the input frequency stability, the fractional frequency offset and the stability of the analogue circuit, and is, for the circuit presented, a few parts in 1010 at an offset frequency of 0.01 Hz if the input frequency is based on a Cs or Rb source. The method can be used for frequencies up to the MHz range.},
  author       = {Yuan, Jiren},
  issn         = {0022-3735},
  language     = {eng},
  number       = {2},
  pages        = {151--154},
  publisher    = {Institute of Physics and the Physical Society},
  series       = {Journal of Physics E: Scientific Instruments},
  title        = {A phase-shifting PLL frequency offseter},
  url          = {http://dx.doi.org/10.1088/0022-3735/21/2/004},
  volume       = {21},
  year         = {1988},
}