Technologies Available for License

2003-022: Charge Sensitive Amplifiers

Invention: 2003-022

Patent Status: U.S. Patent Number 6,998,913 was issued on February 14, 2006

For technical and licensing related questions, email tcp@bnl.gov.

Summary

enlarge

A block diagram of one channel of an application specific integrated circuit (ASIC) incorporating the charge sensitive amplifier.

This invention describes a system and method for charge amplification. More specifically, a front-end system for use with radiation sensors.

Description

The front-end system for use with a radiation sensor includes a charge amplifier and at least one of a current amplifier, a shaping amplifier, a baseline stabilizer, a discriminator, a peak detector, a timing detector, and a logic circuit. The at least one of a current amplifier, shaping amplifier, baseline stabilizer, discriminator, peak detector, timing detector, and logic circuit is operatively attached to the charge amplifier. The charge amplifier receives a signal from the radiation sensor representing detection of an event and includes a signal amplifier, a feedback circuit, and a cancellation circuit. The feedback circuit includes a first capacitor, an inverter, and a current mirror circuit. The first capacitor is electrically joined in parallel across the input terminal and the output terminal of the signal amplifier. The inverter is operatively attached to the output terminal of the signal amplifier, and the current mirror circuit is operatively joined to the input terminal of the signal amplifier. The cancellation circuit is operatively attached to the output terminal of the signal amplifier.

Journal Publication & Intellectual Property

• US 6,998,913 B2 (.pdf)