Invention Grant
US08692590B2 Capacitive load drive circuit, liquid injector, and medical device
有权
电容负载驱动电路，液体注射器和医疗器械
- Patent Title: Capacitive load drive circuit, liquid injector, and medical device
- Patent Title (中): 电容负载驱动电路，液体注射器和医疗器械
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Application No.: US13295876Application Date: 2011-11-14
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Publication No.: US08692590B2Publication Date: 2014-04-08
- Inventor: Atsushi Oshima
- Applicant: Atsushi Oshima
- Applicant Address: JP Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agent Maschoff Brennan
- Priority: JP2010-254581 20101115
- Main IPC: H03K3/00
- IPC: H03K3/00
Abstract:
A drive waveform signal is pulse-modulated and a modulated signal is generated, the obtained modulated signal is power-amplified, and then, a drive signal is demodulated using a low pass filter. Thus obtained drive signal is negatively fed back, and thereby, the resonance peak of the low pass filter is suppressed. In this regard, by bringing gain in a wider frequency domain to take a fixed value or more, a drive signal having a voltage exceeding a power supply voltage may be stably generated.
Public/Granted literature
- US20120119797A1 CAPACITIVE LOAD DRIVE CIRCUIT, LIQUID INJECTOR, AND MEDICAL DEVICE Public/Granted day:2012-05-17
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