POWER MANAGEMENT CIRCUIT

• Main Authors: SLUIJS FERDINAND JACOB, SPEHAR JAMES RAYMOND, JOZEF THOMAS MARTINUS VAN BEEK
• Format: Patent
• Language: Chinese; English
• Published: 29.10.2021
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

One example discloses a power management circuit, including: an ultrasonic transmitter configured to generate an ultrasonic signal having a set of transmitted ultrasonic signal attributes; an ultrasonic receiver configured to detect the ultrasonic signal having a set of received ultrasonic signal attributes; wherein the power management circuit is configured to cause a device to be operated at a first power level and a second power level; and a proximity detection circuit configured to transition the device from the first power level to the second power level in response to a preselected difference between the transmitted set of ultrasonic signal attributes and the received set of ultrasonic signal attributes. 一个例子公开一种功率管理电路，包括：超声波发射器，所述超声波发射器被配置成生成具有一组发射的超声波信号属性的超声波信号；超声波接收器，所述超声波接收器被配置成检测具有一组接收的超声波信号属性的所述超声波信号；其中所述功率管理电路被配置成使得装置在第一功率电平和第二功率电平下操作；以及接近检测电路，所述接近检测电路被配置成响应于所述一组发射的超声波信号属性与所述一组接收的超声波信号属性之间的预选差异而将所述装置从所述第一功率电平转换到所述第二功率电平。