Quadrature amplitude modulation circuitry for ultrasonic transducer
US11209533B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2018 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | Oct 29, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/325
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic transmitter system includes a digital controller, bandpass pulse-width modulator (BP-PWM) unit, a digital to analog converter (DAC), and an ultrasound transducer. The controller generates pulse width and phase reference signals. The BP-PWM configured receives these signals generates a pulse width modulation (PWM) output characterized by a pulse width and a phase based on the pulse width and phase reference signals. The DAC) receives the PWM output from the BP-PWM unit and generates an output characterized by the pulse width and phase. The ultrasonic transducer receives the output from the DAC and generates an output sound pressure in response to the output from the DAC. An amplitude of the RMS sound pressure depends on the pulse width of the output from the DAC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.