Analog signal measuring apparatus
US4638185A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 13, 1984 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Nov 13, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/865
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An analog signal measuring apparatus has: a sampling gate circuit, having a plurality of input terminals including an analog signal input terminal and a feedback signal input terminal, for generating an output signal of high or low level when a sum of input signals goes beyond or falls below a predetermined threshold value; a signal generating circuit, connected to an output terminal of the sampling gate circuit, for changing an output signal by a predetermined level toward a direction in which an output signal level of the sampling gate circuit is inverted when a trigger signal is applied to the signal generating circuit, and for supplying a feedback signal to the feedback signal input terminal of the sampling gate circuit; and a read circuit for generating a value obtained when the feedback signal from the signal generating circuit converges, the feedback signal corresponding to a value of an analog signal supplied to the analog signal input terminal, wherein a ratio of an increment .DELTA.I0 to a decrement .DELTA.I1 in a change in the output from the signal generating circuit is controlled in response to a control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.