公开(公告)号：US20140113680A1

公开(公告)日：2014-04-24

申请号：US14140745

申请日：2013-12-26

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Toshiki SESHITA

IPC: H03K17/687 ,  H04M1/78

CPC classification number: H03K17/6872 ,  H03K17/687 ,  H03K17/693 ,  H04M1/78

Abstract: A switch control circuit has level shifters connected to a switch circuit to convert voltage levels of control signals, a negative potential generating circuit connected to the level shifter, to generate a negative potential, a negative potential output line supplying the negative potential to the level shifter, and a negative potential output line control circuit configured to control the potential of the negative potential output line. The negative potential output line control circuit has a power-supply setting circuit, an inverter inverting the output signal from the power-supply setting circuit, a first capacitor connected between an output terminal of the inverter and the negative potential output line, and a negative potential initialization circuit.

Abstract translation: 开关控制电路具有连接到开关电路的电平移位器，以转换控制信号的电压电平，连接到电平移位器的负电位产生电路以产生负电位，负电位输出线向电平移位器提供负电位 以及负电位输出线控制电路，被配置为控制所述负电位输出线的电位。 负电位输出线控制电路具有电源设定电路，反相来自电源设定电路的输出信号的反相器，连接在反相器的输出端子与负电位输出线之间的第一电容器和负极 潜在的初始化电路。

公开(公告)号：US20120002800A1

公开(公告)日：2012-01-05

申请号：US12828226

申请日：2010-06-30

Applicant: Sean A. Lofthouse

Inventor： Sean A. Lofthouse

IPC: H04M1/78

CPC classification number: H04M1/738

Abstract: A method of controlling a switching regulator includes setting a current limit (ILIM) to a first value, ILIM1. An error voltage (VERR) is computed as a difference between an output voltage VOUT of the switching regulator and a reference voltage VREF of the switching regulator. The switching regulator current limit is set to a second value ILIM2, if the error voltage is greater than a first threshold voltage, VTH1. The switching regulator current limit is set to the first value, if the error voltage does not exceed a second threshold value, VTH2.

Abstract translation: 控制开关调节器的方法包括将电流限制（ILIM）设置为第一值ILIM1。 误差电压（VERR）被计算为开关调节器的输出电压VOUT与开关调节器的参考电压VREF之间的差。 如果误差电压大于第一阈值电压VTH1，则开关调节器电流限制被设置为第二值ILIM2。 如果误差电压不超过第二阈值VTH2，则开关稳压器电流限制被设置为第一值。

公开(公告)号：US20070262894A1

公开(公告)日：2007-11-15

申请号：US11569630

申请日：2005-05-19

Applicant: Germano Nicollini ,  Pierangelo Confalonieri ,  Riccardo Martignone

Inventor： Germano Nicollini ,  Pierangelo Confalonieri ,  Riccardo Martignone

IPC: H03M1/66 ,  H04M1/78

CPC classification number: H04B1/707

Abstract: There is described a circuit for reconstructing an analog signal from a digital signal and wide-band transmission system, particularly for employment in cellular telephony systems, or more in general in mobile communication systems, that adopt the WCDMA standard. The circuit comprises: a digital to analog converter (DAC) suitable for receiving said digital signal and converting it into signal in analog.format;—a low pass-filter (LOW-PASS) connected at the output of said converter for receiving said signal in analog format and providing as output said reconstructed analog signal. Advantageously, the low pass filter (LOW-PASS) is an active filter continuous in time and current coupled to the output of the digital-analog converter (DAC) and the digital-analog converter (DAC) is a converter of the current-steering type functioning at sampling frequency greater than the Nyquist frequency of said analog signal to be reconstructed.

Abstract translation: 描述了一种用于从数字信号和宽带传输系统重建模拟信号的电路，特别是用于蜂窝电话系统中的用途，或更一般地在采用WCDMA标准的移动通信系统中。 该电路包括：适于接收所述数字信号并将其转换成模拟信号的数模转换器（DAC）; - 在所述转换器的输出处连接的低通滤波器（低通滤波器），用于接收所述信号 以模拟格式提供并提供所述重构的模拟信号作为输出。 有利地，低通滤波器（LOW-PASS）是连续的数字模拟转换器（DAC）的输出端的时间和电流连续的有源滤波器，并且数模转换器（DAC）是电流转向器 在大于待重构的所述模拟信号的奈奎斯特频率的采样频率下工作。

公开(公告)号：US4847888A

公开(公告)日：1989-07-11

申请号：US157051

申请日：1988-02-16

Applicant: Edwin G. Cox ,  David T. Ritter

Inventor： Edwin G. Cox ,  David T. Ritter

IPC: H04M1/78 ,  H04M9/02

CPC classification number: H04M9/027 ,  H04M1/78

Abstract: A field telephone system having a widely dispersed set of telephone lines including a page line pair and a party line pair, audio processing equipment including telephone handsets, handset amplifiers, receiver amplifiers and paging speaker amplifiers is designed to have improved voice transmission by provision of a narrow band FM carrier system. The FM carrier system includes a device for generating a carrier frequency signal, a modulator for modulating the carrier frequency with an audio signal derived from one of the handsets at a transmitting station and circuitry for transmitting the modulated signal over a line pair to a receiving station. The receiving station includes circuitry responsive to the transmitted signal and the carrier frequency signal for extracting the audio component of the transmitted signal and for processing the extracted audio signal and for providing the processed audio signal to a handset at the receiving station. A frequency mixing arrangement is utilized to provide a low distortion carrier signal since the system otherwise prevents the use of ordinary filtering techniques.

Abstract translation: 具有广泛分散的一组电话线的现场电话系统包括页线对和一方线对，包括电话手机，手机放大器，接收机放大器和寻呼扬声器放大器的音频处理设备被设计成通过提供一个 窄带FM载波系统。 FM载波系统包括用于产生载波频率信号的装置，用于利用在发射台从手机中的一个导出的音频信号来调制载波频率的调制器和用于通过线对将调制信号发射到接收站的电路 。 接收站包括响应于所发送的信号的电路和载波频率信号，用于提取所发送的信号的音频分量，并用于处理所提取的音频信号，并将经处理的音频信号提供给接收站处的手持机。 使用频率混合装置来提供低失真载波信号，因为系统另外阻止使用普通的滤波技术。

公开(公告)号：US4757528A

公开(公告)日：1988-07-12

申请号：US903785

申请日：1986-09-05

Applicant: Scott L. Falater ,  Mark A. Snowden

Inventor： Scott L. Falater ,  Mark A. Snowden

IPC: H03K17/08 ,  H04M1/738 ,  H04M1/78 ,  H04M19/00 ,  H01L31/00 ,  H04M7/00

CPC classification number: H04M1/78 ,  H03K17/08 ,  H04M1/738 ,  H04M19/005 ,  H04M19/008

Abstract: An electro-thermal isolator coupler including a pair of electrically isolated thermal receivers specifically spaced from an electrically isolated thermal transmitter such that their combined signals will produce a thermally compensated electrical output. A second pair of electrically thermal receivers is included in an error circuit which corrects the driver of the thermal transmitter for losses across the thermal coupler. Depending upon the use, the thermal coupler can be used in combination with RF capacitive coupling. Individual power terminals for the electrically isolated regions assure electric isolation.

Abstract translation: 一种电热隔离器耦合器，包括与电隔离的热发射器特别间隔开的一对电隔离的热接收器，使得它们的组合信号将产生热补偿的电输出。 第二对电热接收器包括在误差电路中，该误差电路校正热变送器的驱动器以用于热耦合器的损耗。 根据使用情况，热耦合器可以与RF电容耦合一起使用。 用于电气隔离区域的单独电源端子可确保电气隔离。

公开(公告)号：US2330612A

公开(公告)日：1943-09-28

申请号：US36741540

申请日：1940-11-27

Applicant: HERBERT NITZ

Inventor： HERBERT NITZ

IPC: H04J1/08 ,  H04M1/78

CPC classification number: H04J1/085 ,  H04M1/78

公开(公告)号：US2280538A

公开(公告)日：1942-04-21

申请号：US36741640

申请日：1940-11-27

Applicant: LORENZ C AG

Inventor： HERBERT NITZ

IPC: H04M1/78

CPC classification number: H04M1/78

公开(公告)号：US1917960A

公开(公告)日：1933-07-11

申请号：US53258531

申请日：1931-04-24

Applicant: AMERICAN TELEPHONE & TELEGRAPH

Inventor： LLOYD ESPENSCHIED

IPC: H04M1/78

CPC classification number: H04M1/78