Frequency response analysis
US4916383A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1989 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Apr 28, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a frequency response analyzer capable of testing a system under test at a higher frequency F derived from a signal generator providing a relatively higher frequency F/K. A reference signal of frequency F-C is supplied to a mixer where it is multiplied with the return signal of frequency F to provide a fixed frequency output C. An analyzing portion of the frequency response analyzer is therefore required to operate only at this fixed frequency C and may provide an output in any suitable form, for example displays of magnitude and phase against frequency as F/K is varied. The present invention overcomes the problem of providing a VCO based signal generator capable of operation at very low frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.