Communication channel using logarithmic detector amplifier (LDA) demodulator
US9077435B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2015 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Apr 1, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2017
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method is provided for communicating signals at a low power level in an electromagnetic interference (EMI) environment. A first device transmits a modulated signal having a first carrier frequency, including the encoded information via a hardwire transmission medium. In one aspect, the power level of the modulated signal can be adjusted to minimize power consumption or reduce the generation of EMI. The modulated signal may be in one of the following formats: frequency modulation (FM) or phase modulation (PM) to name a few examples. A second device including a logarithmic detector amplifier (LDA) demodulator circuit receives the signal, which may be mixed with EMI. The LDA demodulator circuit amplifies the modulated signal, without amplifying the EMI, to supply a demodulated baseband signal, which may be an n-ary digital signal, or an audio signal. A low-power, noise insensitive communication channel is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.