Title:
トランスデューサコントローラを形成する方法及びそのための回路
Document Type and Number:
Japanese Patent JP6899946
Kind Code:
B2
Abstract:
In one embodiment, a transducer controller is configured to form a drive signal with a first frequency to drive a transducer. The drive signal has a period and a half-period and drives the transducer for a first portion of the half-period. The transducer controller is configured to, for a second portion of the half-period, sense a voltage formed by the transducer, measure portions of the voltage and estimate a phase error between the first frequency and a resonant frequency of the transducer, and to adjust the first frequency to a second frequency that reduces the phase error.
Inventors:
Kuteje, Izzy
Holsky, Pavel
Holsky, Pavel
Application Number:
JP2020141361A
Publication Date:
July 07, 2021
Filing Date:
August 25, 2020
Export Citation:
Assignee:
Semiconductor Components Industries Limited Liability Company
International Classes:
G01S7/524
Domestic Patent References:
| JP6194219A | ||||
| JP2014089062A | ||||
| JP11311654A | ||||
| JP2015014691A |
Foreign References:
| WO2014104452A1 | ||||
| US20070193354 |
Attorney, Agent or Firm:
Sonoda/Kobayashi Patent Business Corporation