Frequency counter
US5471402A · kind A · utility
11Cited by
8References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1994 |
| Grant date | Nov 28, 1995 |
| Priority date | — |
| Expiry date | Sep 21, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved frequency counter for detecting and distinguishing a main input signal from amplifier generated self-oscillating signals, wherein the frequency counter generally includes an input circuit having an amplifier and Schmitt-Trigger, a microprocessor for controlling the main gate to a main counter and user inputs, and a signal level display, all of which communicate with the main counter, a display driver and a frequency display for more accurate frequency measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.