基本信息:
- 专利标题： Demodulating circuit and optical receiving circuit
- 专利标题（中）：解调电路和光接收电路
- 申请号：US10721550 申请日：2003-11-26
- 公开(公告)号：US20040233090A1 公开(公告)日：2004-11-25
- 发明人： Tokio Miyasita , Sunao Mizunaga
- 申请人： Oki Electric Industry Co., Ltd.
- 申请人地址： JP Tokyo
- 专利权人： Oki Electric Industry Co., Ltd.
- 当前专利权人： Oki Electric Industry Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 优先权： JP2003-144735 20030522
- 主分类号： H03M001/12
- IPC分类号： H03M001/12 ; H04L027/06
摘要：
A demodulating circuit includes a differentiating circuit that outputs a differentiated signal indicating voltage changes at rising and falling edges of a received pulse signal, and a hysteresis comparator that compares the differentiated signal with upper and lower threshold voltages, thereby generating a demodulated logic-level signal. The differentiating circuit can rapidly track variations in the direct-current offset of the received pulse signal. Positive feedback can enable the hysteresis comparator to maintain the correct output logic level during runs of 0's or 1's of arbitrary length in the received pulse signal. The demodulating circuit consumes comparatively little power, and is particularly useful for receiving signals transmitted in bursts.
摘要（中）：
解调电路包括：微分电路，输出表示接收到的脉冲信号的上升沿和下降沿的电压变化的微分信号;以及滞后比较器，其将微分信号与上限阈值电压和下限阈值电压进行比较，从而产生解调的逻辑电平信号 。 微分电路可以快速跟踪接收到的脉冲信号的直流偏移的变化。 正反馈可以使迟滞比较器在接收到的脉冲信号中的0或1任意长度的运行期间保持正确的输出逻辑电平。 解调电路消耗较少的功率，对于接收以突发方式发射的信号特别有用。
公开/授权文献:
- US06891900B2 Demodulating circuit and optical receiving circuit 公开/授权日：2005-05-10