公开(公告)号：US06819273B2

公开(公告)日：2004-11-16

申请号：US10367966

申请日：2003-02-19

申请人： Tohru Mizutani ,  Hiromi Nanba ,  Atsushi Matsuda ,  Atsushi Hitaka ,  Masashi Okubo ,  Yoshinori Yoshikawa ,  Kenichi Minobe

发明人： Tohru Mizutani ,  Hiromi Nanba ,  Atsushi Matsuda ,  Atsushi Hitaka ,  Masashi Okubo ,  Yoshinori Yoshikawa ,  Kenichi Minobe

IPC分类号： H03M110

CPC分类号： H03M1/1019 ,  H03M1/02

摘要： An integrated circuit includes an analog signal output unit which converts a digital output signal into at least one analog output signal, and outputs the at least one analog output signal, an analog signal input unit which converts at least one analog input signal received from an exterior into a digital input signal, a switch circuit which provides at least one signal path through which the at least one analog output signal is supplied from the analog signal output unit to the analog signal input unit as the at least one analog input signal, and an offset adjustment control circuit which supplies an output offset from the analog signal output unit to the analog signal input unit via the at least one signal path so as to detect the digital input signal inclusive of the output offset and an input offset, and cancels offsets of the analog signal output unit and the analog signal input unit in response to the output offset and the input offset obtained from the detected digital input signal.

摘要翻译： 集成电路包括模拟信号输出单元，其将数字输出信号转换为至少一个模拟输出信号，并输出至少一个模拟输出信号;模拟信号输入单元，其转换从外部接收的至少一个模拟输入信号 提供至少一个信号路径的开关电路，所述至少一个信号路径将所述至少一个模拟输出信号从所述模拟信号输出单元提供给所述模拟信号输入单元，作为所述至少一个模拟输入信号，以及 偏移调整控制电路，其经由所述至少一个信号路径将模拟信号输出单元的输出偏移提供给模拟信号输入单元，以检测包括输出偏移和输入偏移的数字输入信号，并且抵消 模拟信号输出单元和模拟信号输入单元，以响应于从检测到的数字输入信号获得的输出偏移和输入偏移 纳尔

公开(公告)号：US20050162301A1

公开(公告)日：2005-07-28

申请号：US10855738

申请日：2004-05-28

申请人： Tatsuhiro Mizumasa ,  Atsushi Hitaka

发明人： Tatsuhiro Mizumasa ,  Atsushi Hitaka

IPC分类号： H03M1/00 ,  H03M1/06 ,  H03M1/16 ,  H03M1/44 ,  H03M1/66 ,  H03M1/34 ,  H03M1/12

CPC分类号： H03M1/002 ,  H03M1/168 ,  H03M1/44 ,  H03M1/66

摘要： A frequency detecting circuit 10 detects frequency of a sampling pulse SP, and outputs the detected frequency as a detection value VOUT. A current adjusting circuit 20 adjusts a power supply current lvd to be supplied to an AD converter 30 in accordance with the detection value VOUT. The power supply current lvd varies continuously so as to follow the sampling frequency. As a result, an optimum power supply current lvd can always be supplied in accordance with the operating frequency of the AD converter 30. That is, power consumption of the AD converter 30 can be reduced. Since the power supply current lvd can be adjusted in accordance with the sampling frequency, it is possible to form the AD converter 30 that has a wide frequency band and allows great versatility.

摘要翻译： 频率检测电路10检测采样脉冲SP的频率，并将检测到的频率作为检测值VOUT输出。 电流调节电路20根据检测值VOUT来调整要提供给AD转换器30的电源电流lvd。 电源电流lvd连续变化，以便遵循采样频率。 结果，可以总是根据AD转换器30的工作频率提供最佳电源电流lvd。 也就是说，可以减少AD转换器30的功耗。 由于可以根据采样频率来调整电源电流lvd，所以可以形成具有宽频带的AD转换器30并且允许很大的通用性。

公开(公告)号：US06999020B2

公开(公告)日：2006-02-14

申请号：US10855738

申请日：2004-05-28

申请人： Tatsuhiro Mizumasa ,  Atsushi Hitaka

发明人： Tatsuhiro Mizumasa ,  Atsushi Hitaka

IPC分类号： H03M1/34

CPC分类号： H03M1/002 ,  H03M1/168 ,  H03M1/44 ,  H03M1/66

摘要： A frequency detecting circuit 10 detects frequency of a sampling pulse SP, and outputs the detected frequency as a detection value VOUT. A current adjusting circuit 20 adjusts a power supply current Ivd to be supplied to an AD converter 30 in accordance with the detection value VOUT. The power supply current Ivd varies continuously so as to follow the sampling frequency. As a result, an optimum power supply current Ivd can always be supplied in accordance with the operating frequency of the AD converter 30. That is, power consumption of the AD converter 30 can be reduced. Since the power supply current Ivd can be adjusted in accordance with the sampling frequency, it is possible to form the AD converter 30 that has a wide frequency band and allows great versatility.

摘要翻译： 频率检测电路10检测采样脉冲SP的频率，并将检测到的频率作为检测值VOUT输出。 电流调节电路20根据检测值VOUT来调整供给到AD转换器30的电源电流Ivd。 电源电流Ivd连续变化，以便遵循采样频率。 结果，可以总是根据AD转换器30的工作频率提供最佳的电源电流Ivd。 也就是说，可以减少AD转换器30的功耗。 由于可以根据采样频率来调整电源电流Ivd，所以可以形成具有宽频带的AD转换器30并且允许很大的通用性。