Signal modulation circuit
US9787319B2 · kind B2 · utility
1Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2016 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Apr 25, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/00065
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provided is a modulation circuit that can correct an output state in real time and reliably modulate an input signal to output the modulated signal. The signal modulation circuit includes a subtractor, an integrator, a chopper circuit, a frequency divider, and a D-type flip-flop. A delay circuit of a sigma delta modulation circuit is not provided to a feedback circuit, and a signal is delayed and quantized in the D-type flip-flop. The chopper circuit inserts a zero level at timing synchronized with a clock signal, so that pulse density modulation is performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.