Pacific Microchip Corp.

California Institute of Technology

Pulselink, Inc.

Menara Networks, Inc.

Denis Zelenin

Dalius Baranauskas

Gytis Baranauskas

Salam Elahmadi

Matthias Bussmann

Pekka Kangaslahti

Anton Karnitski

Boon H Lim

Reza Ramezani

Alan B Tanner

A system and method for detection of an event and recording data associated with the event. An application-specific integrated circuit (ASIC) for event-driven data acquisition from detector is disclosed. The event-driven circuitry stays silent when there is no event detected on the detector. The event-driven data acquisition system consumes small power and may consume no memory during waiting for an event. Once the event arrives (e.g. photons, particle or ion hits the detector panel), the event is detected and recorded. The ASIC includes multi-channel ADCs (or ADC arrays) with flexible resolution which enables an option to operate at a lower resolution during the silent period to save power.

Circuitry for event-driven data acquisition

According to one embodiment, a cross-correlator comprises a plurality of analog front ends (AFEs), a cross-correlation circuit and a data serializer. Each of the AFEs comprises a variable gain amplifier (VGA) and a corresponding analog-to-digital converter (ADC) in which the VGA receives and modifies a unique analog signal associates with a measured analog radio frequency (RF) signal and the ADC produces digital data associated with the modified analog signal. Communicatively coupled to the AFEs, the cross-correlation circuit performs a cross-correlation operation on the digital data produced from different measured analog RF signals. The data serializer is communicatively coupled to the summing and cross-correlating matrix and continuously outputs a prescribed amount of the correlated digital data.

Signal digitizer and cross-correlation application specific integrated circuit

According to one embodiment of the invention, a circuit comprising a plurality of operational transconductance amplifiers (OTAS) is described. The first OTA has differential input and differential output. The second OTA also has differential input, where a first output of the first OTA is coupled to the first differential input of the second OTA, which is an inverting input. A second output of the first OTA is coupled to the second input of the second OTA, which is a non-inverting input. The first differential output being coupled to a first input of the first OTA and the second differential output being coupled to a second input of the first OTA for negative feedback and current biasing.

[object Object]

The present invention provides a high speed digital-to-analog converter (DAC), and components for a high speed DAC. One embodiment of the present invention provides a novel current switching circuit that surmounts parasitic capacitance of the circuit elements. In another embodiment, the DAC includes a novel built-in-test circuit, which allows tests of the DAC at high speeds. One feature of the DAC constructed according to the present invention, is that it enables direct digital synthesis of communication waveforms. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims.

Digital to analog converter

Growing community of inventors

Brentwood, CA, United States of America

Denis Zelenin