超音波診断装置
- 专利权人:
- 日立アロカメディカル株式会社
- 发明人:
- 藤木 俊昭
- 申请号：
- JP2006282853
- 公开号：
- JP4980688B2
- 申请日:
- 2006.10.17
- 申请国别(地区):
- JP
- 年份:
- 2012
- 代理人:
- 摘要：
To provide an ultrasonic diagnostic system which enables a fine control of delay time while reducing the scale of the circuits at the transmitting part.
SOLUTION: A clock group generation circuit 40 generates a group of clocks with the phases varied at the same frequency as that of a transmission clock 100. One select clock 112 is selected from the group of clocks with a clock selection circuit 52 according to the value of a decimal delay data 114B. An integer delay data 114A is inputted into a delay counter 56 and waveform data are housed into a waveform memory 46. The waveform memory 46 reads out the waveform data using either the transmission clock 100 or the select clock 112 and a latch circuit 50 or a D/A converter 34 operates using the select clock 112. This allows the addition of a fine delay time to an analog signal outputted from the D/A converter 34 in addition to a coarse delay time.
COPYRIGHT: (C)2008 and JPO& INPIT
- 来源网站：
- 中国工程科技知识中心
