Start signal detector circuit
US8446179B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2006 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | May 30, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0812
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A non-linear effect of a rectifier element is enhanced, an input amplitude is increased by further taking advantage of a resonance circuit, and a rectification efficiency of a rectifier circuit for detection is improved, so that the gain of an amplifier circuit at a latter stage can be set low. RF input terminals 101, 102 are applied with signals at phases opposite to each other. A signal at terminal 102 is applied to a gate of transistor M1 through capacitor C3, and a signal at terminal 101 is applied to node N1 connected with a source of transistor M1 and a gate and a drain of transistor M2 through capacitor C1. 301, 302 designate terminals applied with DC biases, and L1, C15 and L2, C16 are series resonance circuits. Half-wave double voltage rectifier circuits comprised of M1, M2, C1-C3, R1 are connected in cascade at a plurality of stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.