Supertex, Inc.

Microchip Technology Inc.

Ching Chu

Benedict C K Choy

Benedict Choy

Andy Tu

Jimes Lei

Ming-Yuan Yeh

Haibing (Robin) Liu

Ben Choy

An electrical waveform generating circuit has a pair of Pulse Amplitude Controlled Switching Current Sources (PACS). A gate pulse driver circuit is coupled to an input of each of the pair of PACS for sending gate pulses for driving the pair of PACS. A digital-to-analog converter (DAC) circuit is coupled to the gate pulse driver circuit for controlling amplitudes of the gate pulses. A transducer is coupled to the PACS.

Pulse amplitude controlled current source for ultrasound transmit beamformer and method thereof

A capacitive parametric zero crossing detection circuit has a nonlinear voltage controlled capacitive device coupled to an input voltage to convert a zero crossing current pulse into zero crossing voltage signal.

Capacitive parametric zero crossing detector device, circuit and method

An ultrasound image system has a plurality of channels. At least one of the plurality of channels has a capacitive T/R switch.

Ultrasound capacitive T/R switch device, circuit

A circuit module comprises a die attach pad with a surface and a plurality of leads surrounding the surface. A nonconductive adhesive is on the surface. A plurality of electronic circuit dies are on the surface of the die attach pad. Each die has a top surface and a bottom surface with the bottom surface on the adhesive. The top surface has a plurality of bonding pads. A first electronic circuit die has at least one routing path of a conductive material connecting a first bonding pad to a second bonding pad. A first bonding wire connects a bonding pad of a second electronic circuit die to the first bonding pad of the first electronic die. A second bonding wire connects the second bonding pad of the first electronic circuit die to a lead. Where one of the dies contains vertical circuit element, where a doped layer forms a terminal along the bottom surface of the layer, a trench filled with doped polysilicon extends from the top surface to the terminal to connect to the terminal. The doped polysilicon filled trench also serves to isolate and separate different circuit elements.

Multi-chip package module and a doped polysilicon trench for isolation and connection

An electrical waveform generating circuit has a programmable current source-driver. A digital switched current source is coupled to the programmable current source-driver and controlled by waveforms stored in the programmable current source-driver. A plurality of MOSFETs is coupled to the programmable current source driver. A first coupled inductor is connected to the plurality of high voltage MOSFETs. A transducer is coupled to the first coupled inductor.

Programmable ultrasound transmit beamformer integrated circuit and method

A multi-level high-voltage pulse generator integrated circuit has a digital logic-level control interface circuit. A pair of complementary MOSFETs is controlled by the digital control interface circuit. A pair of supply voltage rails is provided, wherein one of the pair of supply voltage rails is connected to each of the pair of complementary MOSFETs. A pair of Zener diodes is provided, wherein one of the pair of Zener diodes is connected to each of the pair of complementary MOSFETs. A pair of resistors is provided, wherein one of the pair of resistors is connected in parallel with each of the pair of Zener diodes. A pair of complementary voltage blocking-MOSFETs having predetermined gate bias voltages is provided, wherein each of the pair complementary voltage blocking-MOSFETs is attached to a corresponding one pair of complementary MOSFETs.

Multi-level high voltage pulser integrated circuit using low voltage MOSFETs

A digital switched current source is coupled to a programmable current source-driver and controlled by waveforms stored in the programmable and floating complementary sourcing and sinking current source-driver. A plurality of complementary P- and N-MOSFET is coupled to the programmable floating current source driver. The transformer-less programmable ultrasound transmit beamformer integrated circuit is provided and directly coupled to the plurality of transducers.

An electrical waveform generating circuit has a programmable current source-driver. A digital switched current source is coupled to the programmable current source-driver and controlled by waveforms stored in the programmable current source-driver. A plurality of MOSFETs is coupled to the programmable current source driver. A center-tapped RF transformer is provided and has a primary coupled to the plurality of high voltage MOSFETs. A transducer is coupled to a secondary of the RF transformer.

A ultrasound transmit pulse waveform generator for driving a piezoelectric transducer in medical ultrasound imaging, nondestructive testing (NDT) ultrasound imaging applications, includes a capacitor, switching programmable current sources, and a power amplifier.

Ultrasound transmit pulse generator

A complementary high voltage switched current source circuit has a complementary current source pair, wherein a first of the current source pair is coupled to a positive voltage rail and a second of the current source pair is coupled to a negative voltage rail. A digital logic-level control interface circuit is coupled to the complementary current source pair and to the positive voltage rail and the negative voltage rail. A pair of high voltage switches is coupled to the complementary current source pair and the digital logic-level control interface circuit and controlled by the digital control interface circuit.

Complementary high voltage switched current source integrated circuit

An integrated circuit high voltage analog switch has digital logic-level control interface circuit. A level translator is coupled to the digital logic-level control interface circuit. A plurality of output multi-channel high voltage switches is coupled to the level translator.

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San Jose, CA, United States of America

Ching Chu