Level detector
US4513209A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1982 |
| Grant date | Apr 23, 1985 |
| Priority date | — |
| Expiry date | Feb 11, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/165
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A level detector having good linearity and a high detection efficiency is arranged so as to be small in size and inexpensive to produce, thereby being well suited for use in a semiconductor integrated circuit. The detector employs a common emitter amplifier having two transistors connected in parallel so that odd order harmonic distortion components are mutually eliminated while DC and even order harmonic components appear at the collector thereof. The detector further includes a high impedance load for the two parallel connected transistors. The load is composed of a transistor normally biased in its active region so as to thereby raise the detection efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.