| 发明名称 | Power supply unit and electronic timepiece | ||
| 摘要 | A power supply unit has a first power supply circuit that supplies a voltage to a load driving unit and a second power supply circuit that supplies a voltage to circuits other than the load driving unit. A first switching unit connects any one of a power supply that supplies a power supply voltage and a voltage step-down circuit that supplies a step-down voltage of the power supply voltage to the first power supply circuit. A second switching unit connects any one of the power supply and the voltage step-down circuit to the second power supply circuit. A control unit controls the connection by the first switching unit and the connection by the second switching unit to switch the voltage supplied to the first power supply circuit and the voltage supplied to the second power supply circuit in accordance with properties of the load driving unit. | ||
| 申请公布号 | US8982675(B2) | 申请公布日期 | 2015.03.17 |
| 申请号 | US201113199499 | 申请日期 | 2011.08.31 |
| 申请人 | Seiko Instruments Inc. | 发明人 | Kato Kazuo;Takakura Akira;Fukushima Toshitaka;Tsubata Keisuke;Nakamura Hisao;Ihashi Tomohiro;Sugai Yoshinori;Noguchi Eriko;Sakai Satoshi;Hasegawa Takanori |
| 分类号 | G04C23/00;G04C17/00;G05F1/00;G06F3/038;H02J1/10;G04C10/02;G04G19/06;H02J7/00;H02J7/34 | 主分类号 | G04C23/00 |
| 代理机构 | Adams & Wilks | 代理人 | Adams & Wilks |
| 主权项 | 1. A power supply unit comprising: a first power supply circuit that supplies a voltage to a load driving unit that drives a load unit; a second power supply circuit that supplies a voltage to circuits other than the load driving unit; a first switching unit that connects any one of a power supply that supplies a power supply voltage and a voltage step-down circuit that supplies a step-down voltage of the power supply voltage to the first power supply circuit; a second switching unit that connects any one of the power supply that supplies the power supply voltage and the voltage step-down circuit that supplies the step-down voltage of the power supply voltage to the second power supply circuit, the second switching unit being disposed in parallel to the first switching unit; and a control unit that controls the connection by the first switching unit and the connection by the second switching unit to switch the voltage supplied to the first power supply circuit and the voltage supplied to the second power supply circuit in accordance with properties of the load driving unit. | ||
| 地址 | JP | ||