发明授权
- 专利标题: Capacitive load driving circuit and liquid ejection device
- 专利标题(中): 电容式负载驱动电路和液体喷射装置
-
申请号: US13351770申请日: 2012-01-17
-
公开(公告)号: US08757749B2公开(公告)日: 2014-06-24
- 发明人: Atsushi Oshima , Kunio Tabata , Noritaka Ide , Hiroyuki Yoshino
- 申请人: Atsushi Oshima , Kunio Tabata , Noritaka Ide , Hiroyuki Yoshino
- 申请人地址: JP Tokyo
- 专利权人: Seiko Epson Corporation
- 当前专利权人: Seiko Epson Corporation
- 当前专利权人地址: JP Tokyo
- 代理商 Maschoff Brennan
- 优先权: JP2011-007556 20110118
- 主分类号: B41J29/38
- IPC分类号: B41J29/38 ; B41J2/045
摘要:
A liquid ejection device, includes: a drive waveform signal output circuit which outputs a drive waveform signal to serve as a reference for the drive signal; a modulator which pulse-modulates the drive waveform signal and thus generates a first modulated signal and a second modulated signal having a different phase from the first modulated signal within a range from greater than 90 degrees to smaller than 270 degrees; a first digital power amplifier; a second digital power amplifier a first low pass filter which performs low pass filtering of the first amplified digital signal and thus generates a first demodulated signal; and a second low pass filter which performs low pass filtering of the second amplified digital signal and thus generates a second demodulated signal; wherein the first demodulated signal and the second demodulated signal are combined and applied as the drive signal to the capacitive load.