公开(公告)号：US4862170A

公开(公告)日：1989-08-29

申请号：US171812

申请日：1988-03-22

Applicant: Youichi Hashimoto ,  Takashi Tokuyama ,  Kazuya Nishiga ,  Yoshihiro Arai ,  Nobuhide Ueki ,  Naoki Adachi

Inventor： Youichi Hashimoto ,  Takashi Tokuyama ,  Kazuya Nishiga ,  Yoshihiro Arai ,  Nobuhide Ueki ,  Naoki Adachi

IPC: G11B20/10 ,  H03M1/00 ,  H03M1/66

CPC classification number: H03M1/00 ,  H03M2201/03 ,  H03M2201/196 ,  H03M2201/30 ,  H03M2201/4212 ,  H03M2201/4225 ,  H03M2201/4233 ,  H03M2201/4262 ,  H03M2201/526 ,  H03M2201/6121 ,  H03M2201/721

Abstract: A digital analog converter which is especially suitable for use in converting a digital audio signal into an analog audio signal includes a unit pulse response signal generator for successively generating unit pulse response signals at a predetermined time interval, a digital data generator for generating digital data at the predetermined time interval, a multiplier for multiplying a unit pulse response signal generated at a certain time by a predetermined item of the digital data, and a mixer for producing an analog signal output by combining the unit pulse response signals that have been multiplied by the digital data.

Abstract translation: 特别适用于将数字音频信号转换为模拟音频信号的数字模拟转换器包括用于以预定的时间间隔连续产生单位脉冲响应信号的单位脉冲响应信号发生器，用于产生数字数据的数字数据发生器 所述预定时间间隔，用于将在某一时间产生的单位脉冲响应信号乘以数字数据的预定项目的乘法器和用于产生模拟信号的混频器，所述混频器通过将已经乘以所述单位脉冲响应信号 数字数据。

公开(公告)号：US4350976A

公开(公告)日：1982-09-21

申请号：US215134

申请日：1980-12-10

Applicant: Roger Benoit-Gonin ,  Jean L. Berger ,  Jean L. Coutures

Inventor： Roger Benoit-Gonin ,  Jean L. Berger ,  Jean L. Coutures

IPC: H03M1/66 ,  H03M1/00 ,  H03K13/02

CPC classification number: H03M1/00 ,  H03M2201/02 ,  H03M2201/2241 ,  H03M2201/2266 ,  H03M2201/2291 ,  H03M2201/3105 ,  H03M2201/3178 ,  H03M2201/4135 ,  H03M2201/4212 ,  H03M2201/4233 ,  H03M2201/4262 ,  H03M2201/81 ,  H03M2201/8128 ,  H03M2201/814 ,  H03M2201/837

Abstract: Successive two-trip traversals of charges between gates G.sub.0 and G.sub.2 make it possible to obtain beneath gates G.sub.1 and G.sub.2 quantities of charges equal to Q.sub.R, Q.sub.R /2, Q.sub.R /2.sup.2 . . . Q.sub.R /2.sup.i. A readout device for reading charges and connected to gates G.sub.2 and G.sub.4 generates voltages V.sub.R and V.sub.Ri =a.sub.0 .multidot.V.sub.R +a.sub.1 .multidot.V.sub.R /2+ . . . +a.sub.i-1 .multidot.V.sub.R /2.sup.i-1 +V.sub.R /2.sup.i which are compared with a voltage sample V.sub.x to be coded in order to determine by successive approximations the coefficients a.sub.0 . . . a.sub.n which are equal to 0 or to 1 such that V.sub.x =a.sub.0 .multidot.V.sub.R +a.sub.1 .multidot.V.sub.R /2+ . . . +a.sub.n .multidot.V.sub.R /2.sup.n. Depending on the value of a.sub.i, each quantity of charges Q.sub.R /2.sup.i stored beneath gate G.sub.1 is removed beneath diode D.sub.e or stored beneath gate G.sub.3 and then transferred beneath gate G.sub.4.

Abstract translation: 栅极G0和G2之间的电荷的连续两次跳变使得可以获得栅极G1和G2之下的等于QR，QR / 2，QR / 22的电荷量。 。 。 QR / 2i 用于读取电荷并连接到门G2和G4的读出装置产生电压VR和VRi = a0xVR + a1xVR / 2 +。 。 。 + ai-1xVR / 2i-1 + VR / 2i，其与要编码的电压采样Vx进行比较，以便通过逐次逼近来确定系数a0。 。 。 a等于0或1，使得Vx = a0xVR + a1xVR / 2 +。 。 。 + anxVR / 2n。 根据ai的值，存储在栅极G1下方的每个电荷量QR / 2i在二极管De下方被去除或存储在栅极G3下方，然后在栅极G4下方传送。

公开(公告)号：US3936819A

公开(公告)日：1976-02-03

申请号：US322333

申请日：1973-01-10

Applicant: Philippe Angelle ,  Georges Lefevre

Inventor： Philippe Angelle ,  Georges Lefevre

IPC: H03M1/40 ,  G11C27/02 ,  H03F3/72 ,  H03G3/20 ,  H03M1/00 ,  H03K13/02

CPC classification number: H03M1/00 ,  G11C27/026 ,  H03F3/72 ,  H03M2201/01 ,  H03M2201/14 ,  H03M2201/16 ,  H03M2201/2241 ,  H03M2201/2283 ,  H03M2201/4105 ,  H03M2201/4135 ,  H03M2201/4204 ,  H03M2201/4212 ,  H03M2201/4233 ,  H03M2201/4262 ,  H03M2201/534 ,  H03M2201/712 ,  H03M2201/715 ,  H03M2201/8124

Abstract: An electronic device for amplifying, with automatic gain control by discr values, analogue signal samples and thereafter preferably effecting analogue-to-digital conversion of the samples, consists of an amplifier circuit, a comparator circuit, and a delay store circuit. The amplifier has a basic gain during a gain control or gain ranging operation, and supplies an output sample amplified with sufficient gain to bring it into the region of a predetermined voltage. The comparator circuit compares the output of the amplifier circuit with a reference and supplies an output in accordance with the result of the comparison. For analogue-to-digital conversion the amplifier circuit supplies for an input signal U an output signal 2U - VQ, where VQ is the quantification voltage, or, in other embodiments a signal 2U.

Abstract translation: 用于通过离散值的自动增益控制来放大模拟信号样本的电子装置，其后优选地进行样本的模数转换，由放大器电路，比较器电路和延迟存储电路组成。 放大器在增益控制或增益测距操作期间具有基本增益，并且以足够的增益提供放大的输出样本，使其进入预定电压的区域。 比较器电路将放大器电路的输出与参考值进行比较，并根据比较结果提供输出。 对于模拟到数字转换，放大器电路为输入信号U提供输出信号2U-VQ，其中VQ是量化电压，或者在其它实施例中为信号2U。

公开(公告)号：US20180367157A1

公开(公告)日：2018-12-20

申请号：US15967026

申请日：2018-04-30

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Wataru NAITO ,  Takeshi KONDO

IPC: H03M1/10

CPC classification number: H03M1/1023 ,  H03M2201/4212 ,  H04L2027/0065 ,  H04L2027/0067

Abstract: Degradation of a reception performance by an image signal is reduced. A semiconductor device includes: an oscillation circuit configured to generate a local signal; a mixer configured to multiply a reception signal by the local signal; an analog filter configured to filter a signal output from the mixer; an AD converter configured to digitalize a signal that has passed through the analog filter to generate a first signal; a digital filter configured to filter a signal that has passed through the AD converter to generate a second signal; a power comparator configured to detect the power difference between the first signal and the second signal; a register configured to store a theoretical power difference; and a determination unit configured to determine a frequency of the local signal based on the power difference from the theoretical power difference.

公开(公告)号：US4010422A

公开(公告)日：1977-03-01

申请号：US409425

申请日：1973-10-25

Applicant: Kornelis Jan Wouda

Inventor： Kornelis Jan Wouda

IPC: H03M1/00 ,  H04B14/04 ,  H04B1/04

CPC classification number: H04B14/04 ,  H03M1/00 ,  H04B14/048 ,  H03M2201/01 ,  H03M2201/14 ,  H03M2201/16 ,  H03M2201/196 ,  H03M2201/2344 ,  H03M2201/4105 ,  H03M2201/4135 ,  H03M2201/4204 ,  H03M2201/4212 ,  H03M2201/4225 ,  H03M2201/4233 ,  H03M2201/425 ,  H03M2201/4262 ,  H03M2201/52 ,  H03M2201/523 ,  H03M2201/534 ,  H03M2201/60 ,  H03M2201/6121 ,  H03M2201/712 ,  H03M2201/715 ,  H03M2201/8124

Abstract: A non-linear pulse code modulator wherein input signals are coded into digital representations of amplitude range segments and amplitude in excess of the minimum amplitude within the respective range segment uses a first analog-to-digital converter having a sawtooth-shaped control characteristic to determine the amplitude range segment from an input signal sample. The output of the first analog-to-digital converter is used to effectively divide the signal sample by a factor 2.sup.n, where n corresponds to the determined range. The result of the division is then converted in a second analog-to-digital conversion to a digital signal that is combined with the digital range segment signal for transmission thereof.