Signal envelope processing
US9800206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2016 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | May 26, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/102
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for detection and tracking of a signal envelope. The circuit comprises absolute value circuitry configured to receive data samples and output a first value corresponding to the magnitude of said data samples. An envelope tracker maintains an envelope output value and compares the first value to the current envelope output value and modifies the envelope output value based on said comparison to provide the envelope output value with predetermined attack and decay characteristics. The absolute value circuitry has a first input for receiving a first digital signal at a first sample rate and a second input for receiving an interpolated version of the first digital signal at a second sample rate which is higher than the first sample rate and outputs the first value based on the magnitudes of the samples received at the first input and the samples received at the second input. Using the first digital signal provides an early indication of any increases in signal envelope whereas the second digital signal can allow a more accurate estimation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.