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    TIME GAIN COMPENSATION CIRCUIT IN AN ULTRASOUND RECEIVER
    2.
    发明申请
    TIME GAIN COMPENSATION CIRCUIT IN AN ULTRASOUND RECEIVER 审中-公开
    超声波接收机中的时间增益补偿电路

    公开(公告)号：US20150280662A1

    公开(公告)日：2015-10-01

    申请号：US14637146

    申请日：2015-03-03

    申请人： Texas Instruments Incorporated

    发明人： Vajeed Nimran ,  Raja Sekhar ,  Sandeep Oswal ,  Shagun Dusad

    IPC分类号： H03F3/45 ,  H03F1/56 ,  A61B8/14

    CPC分类号： H03F1/56 ,  G01S7/52033 ,  H03F3/45475 ,  H03F2203/45134 ,  H03F2203/45151 ,  H03F2203/45528 ,  H03F2203/45591 ,  H03G1/0035 ,  H03G3/3005 ,  H03G3/301

    摘要： The disclosure provides a time gain compensation (TGC) circuit. The TGC circuit includes an impedance network. A differential amplifier is coupled to the impedance network. The differential amplifier includes a first input port, a second input port, a first output port and a second output port. A first feedback resistor is coupled between the first input port and the first output port. A second feedback resistor is coupled between the second input port and the second output port. The impedance network provides a fixed impedance to the differential amplifier when a gain of the TGC circuit is changed from a maximum value to a minimum value.

    摘要翻译： 本公开提供了时间增益补偿（TGC）电路。 TGC电路包括阻抗网络。 差分放大器耦合到阻抗网络。 差分放大器包括第一输入端口，第二输入端口，第一输出端口和第二输出端口。 第一反馈电阻耦合在第一输入端口和第一输出端口之间。 第二反馈电阻耦合在第二输入端口和第二输出端口之间。 当TGC电路的增益从最大值变为最小值时，阻抗网络向差分放大器提供固定阻抗。

    Output Stage for High-Voltage Linear Transmitters
    3.
    发明公开
    Output Stage for High-Voltage Linear Transmitters 审中-公开

    公开(公告)号：US20240238841A1

    公开(公告)日：2024-07-18

    申请号：US18192863

    申请日：2023-03-30

    申请人： Texas Instruments Incorporated

    发明人： Raja Sekhar ,  Ravikumar Pattipaka ,  Sandeep Oswal

    IPC分类号： B06B1/02 ,  B06B1/06 ,  H03F3/183

    CPC分类号： B06B1/0207 ,  B06B1/06 ,  H03F3/183 ,  A61B8/4488 ,  H03F2200/03

    摘要： An ultrasonic transceiver system including a transducer, a receiver coupled to the transducer, a transmitter having an output terminal coupled to the transducer, and a transmit/receive switch configured to isolate the receiver from the transmitter during transmission. The transmitter includes an amplifier and an output stage. The output stage includes a source follower transistor having a drain coupled to a supply terminal, a gate coupled to an output of the amplifier, and a source coupled to an output terminal, along with a power stage transistor having a source coupled to the supply terminal, a gate coupled to the drain of the source follower transistor, and a drain coupled to the output terminal. The output stage further includes a parallel source follower transistor having a drain coupled to the supply terminal, a gate coupled to the input terminal, and a source coupled to the output terminal.

    Time gain compensation circuit in an ultrasound receiver
    4.
    发明授权
    Time gain compensation circuit in an ultrasound receiver 有权

    公开(公告)号：US10985708B2

    公开(公告)日：2021-04-20

    申请号：US15980771

    申请日：2018-05-16

    申请人： Texas Instruments Incorporated

    发明人： Vajeed Nimran ,  Raja Sekhar ,  Sandeep Oswal ,  Shagun Dusad

    IPC分类号： H03F1/56 ,  H03F3/45 ,  H03G1/00 ,  H03G3/30 ,  G01S7/52

    摘要： The disclosure provides a time gain compensation (TGC) circuit. The TGC circuit includes an impedance network. A differential amplifier is coupled to the impedance network. The differential amplifier includes a first input port, a second input port, a first output port and a second output port. A first feedback resistor is coupled between the first input port and the first output port. A second feedback resistor is coupled between the second input port and the second output port. The impedance network provides a fixed impedance to the differential amplifier when a gain of the TGC circuit is changed from a maximum value to a minimum value.

    Linearity Correction in High Voltage Transmit Switches
    5.
    发明公开
    Linearity Correction in High Voltage Transmit Switches 审中-公开

    公开(公告)号：US20240243714A1

    公开(公告)日：2024-07-18

    申请号：US18193243

    申请日：2023-03-30

    申请人： Texas Instruments Incorporated

    发明人： Ravikumar Pattipaka ,  Raja Sekhar ,  Sandeep Oswal

    IPC分类号： H03F3/45 ,  H03F1/32 ,  H03G3/30

    CPC分类号： H03F3/45475 ,  H03F1/3211 ,  H03G3/3042

    摘要： An ultrasonic transmitter including a linear amplifier, an output stage, a switch, and a current compensation circuit. The linear amplifier includes first and second amplifier stages. The output stage has an input coupled to output of the linear amplifier, and presents the transmitter output. The switch is coupled to the output of the linear amplifier. The current compensation circuit has an output coupled at the output of the first amplifier stage. Select circuitry is configured to couple the switch to a bias terminal when the switch is closed, and to couple one or more nodes of the switch to the control terminal of the current compensation circuit when the switch is open. The current compensation circuit generates a compensation current responsive to a sensed non-linear current conducted through the switch when open.

    TIME GAIN COMPENSATION CIRCUIT IN AN ULTRASOUND RECEIVER
    6.
    发明申请
    TIME GAIN COMPENSATION CIRCUIT IN AN ULTRASOUND RECEIVER 有权

    公开(公告)号：US20210211102A1

    公开(公告)日：2021-07-08

    申请号：US17210251

    申请日：2021-03-23

    申请人： Texas Instruments Incorporated

    发明人： Vajeed Nimran ,  Raja Sekhar ,  Sandeep Oswal ,  Shagun Dusad

    IPC分类号： H03F1/56 ,  H03F3/45

    摘要： The disclosure provides a time gain compensation (TGC) circuit. The TGC circuit includes an impedance network. A differential amplifier is coupled to the impedance network. The differential amplifier includes a first input port, a second input port, a first output port and a second output port. A first feedback resistor is coupled between the first input port and the first output port. A second feedback resistor is coupled between the second input port and the second output port. The impedance network provides a fixed impedance to the differential amplifier when a gain of the TGC circuit is changed from a maximum value to a minimum value.