Power-efficient chopper amplifier
US9924904B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2014 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Jul 23, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45424
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In an example, an electrical circuit device for amplifying a physiological signal includes a modulation unit configured to receive an input signal, to modulate the input signal to produce a modulated signal. The device also includes an amplification and transconductance unit configured to amplify an amplitude of the modulated signal and increase a transconductance of the modulated signal to produce a transconductance enhanced modulated and amplified signal, where the amplification and transconductance unit comprises at least a first complementary pair of transistors and a second complementary pair of transistors configured to receive the modulated signal and to amplify and increase the transconductance of the modulated signal. The device also includes a demodulation unit configured to receive the transconductance enhanced modulated and amplified signal and to demodulate the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.