Frequency and instantaneous voltage level meter
US5412312A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1992 |
| Grant date | May 2, 1995 |
| Priority date | — |
| Expiry date | Oct 1, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A volt/frequency meter includes LED arrays which provide bar-graph style meter displays of the instantaneous voltage and the frequency of a variable electric analog signal. Each LED in the voltage array corresponds to a predetermined voltage range and each LED in the frequency array corresponds to a predetermined frequency range. The meter is switchable among three different voltage scales and three different frequency scales. A separate LED flashes momentarily in response to the input signal crossing a user-determined limit set point which is adjusted through a knob on the front panel. The limit set point controls the operation of the frequency display such that the displayed frequency is the rate at which the analog signal crosses the limit set point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.