Pasternack, a leading provider of RF, microwave and millimetre wave products, has unveiled a new line of phase locked
oscillators (PLO) that deliver accurate and stable output frequencies with low phase noise and spurious performance, making them ideal for use in radar and other exciter or frequency generation applications.
Frequency acquisition techniques for phase locked
The SFDRO Series frequency phase locked
oscillators are designed to accommodate as many as six discrete frequency levels in one unit.
0 GHz phase locked
oscillators employ a unique technique to phase-lock microwave DROs to a 5 or 10 MHz crystal reference.
This first demonstration of an optical clock with a microwave output, reported in the August 3 issue of Science, involves an optical frequency standard coupled to a new optical-frequency synthesizer that bridges an octave in the optical spectrum and provides for a direct microwave output that is phase locked
to the optical standard.
The 2 measures of 40-Hz EEG analyzed were (a) evoked 40 Hz, which is phase locked
to stimulus onset, and (b) induced 40 Hz, which is not phase locked
to the stimulus.
Both outputs have a maximum 40/60 duty cycles and are phase locked
to one of two selected input references.
When DROs are phase locked
to a clean, stable crystal reference, their noise performance reaches an unmatched level.
National Semiconductor has announced the addition of two frequency synthesizers to its PLLatinum line of phase locked
loops (PLLs) for wireless infrastructure applications.
In the source lock mode, the local oscillators in the test set are phase locked
to a precise reference.
Its core YIG technology is ideally suited to a wide range of applications, such as free-running and phase locked
oscillators in narrow and wide band configurations, band-pass and band-reject filters, narrow and wide band frequency synthesizers and converters as well as highly integrated front-end modules for radio and instrumentation applications.
The fundamental mm-wave phase-locked DRO is based upon a fundamental voltage tuned DRO at the output frequency locked to a reference signal via a proprietary sampling phase locked
loop, as shown in Figure 1.