公开(公告)号：US20150256193A1

公开(公告)日：2015-09-10

申请号：US14711733

申请日：2015-05-13

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Takashi OSHIMA ,  Tatsuji MATSUURA ,  Yuichi OKUDA ,  Hideo NAKANE ,  Takaya YAMAMOTO ,  Keisuke KIMURA

IPC: H03M1/12 ,  H03M1/44 ,  H03M1/06 ,  H03M1/00

CPC classification number: H03M1/1245 ,  H03M1/002 ,  H03M1/0609 ,  H03M1/0639 ,  H03M1/1038 ,  H03M1/109 ,  H03M1/14 ,  H03M1/38 ,  H03M1/44 ,  H03M1/46 ,  H03M1/56

Abstract: A digital-correction-type A/D converter which is a charge sharing type and performing successive approximation is realized in a small area. The A/D converter is configured with an A/D conversion unit which is a charge sharing type and performing successive approximation, a digital correction unit which receives a digital output of the A/D conversion unit and performs digital correction to the digital output, and a holding unit which holds a test signal. A test signal of a common value from the holding unit is inputted into the A/D conversion unit in the first period and the second period. The A/D conversion correction coefficient for the digital correction unit is calculated on the basis of the digital correction result of the digital correction unit in the first period, and the digital correction result of the digital correction unit in the second period.

Abstract translation: 在小区域中实现了作为电荷共享型并进行逐次逼近的数字校正型A / D转换器。 A / D转换器配置有作为电荷共享型的A / D转换单元并执行逐次逼近，数字校正单元接收A / D转换单元的数字输出并对数字输出执行数字校正， 以及保持测试信号的保持单元。 来自保持单元的公共值的测试信号在第一周期和第二周期中被输入到A / D转换单元。 基于第一周期中的数字校正单元的数字校正结果和第二周期中的数字校正单元的数字校正结果来计算数字校正单元的A / D转换校正系数。

公开(公告)号：US20150229322A1

公开(公告)日：2015-08-13

申请号：US14692374

申请日：2015-04-21

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Yuichi OKUDA ,  Hideo NAKANE ,  Takaya YAMAMOTO ,  Keisuke KIMURA ,  Takashi OSHIMA ,  Tatsuji MATSUURA

IPC: H03M1/38 ,  H03F3/45 ,  H03M1/00

CPC classification number: H03M1/1009 ,  G11C27/02 ,  H03F1/02 ,  H03F1/3211 ,  H03F3/005 ,  H03F3/45071 ,  H03F3/45475 ,  H03F2203/45171 ,  H03F2203/45544 ,  H03H7/004 ,  H03M1/002 ,  H03M1/124 ,  H03M1/38 ,  H03M1/44

Abstract: A differential signal is amplified by passive amplification which does not a reference of a common-mode voltage. At this time, the voltage of the differential signal is passive-amplified twice before carrying out a successive approximation type analog-digital conversion operation. The passive amplification is attained by providing a plurality of capacitances which carry out a sampling operation, and switching these connection relation by using switches. Without being accompanied by the increase of the consumed power and the chip size, an influence by the noise of s comparator is reduced to a half so that the effective resolution can be increased for one bit.

Abstract translation: 差分信号被无源放大放大，其不是共模电压的参考。 此时，在进行逐次逼近型模拟数字转换操作之前，差分信号的电压被无源放大两次。 无源放大通过提供执行采样操作的多个电容来实现，并且通过使用开关来切换这些连接关系。 在不伴随消耗功率和芯片尺寸的增加的情况下，将比较器的噪声的影响减小到一半，使得有效分辨率可以增加一位。