Digital-analogue converter for multi-threshold counters with partitioning of the bits between resistor ladder and comparator

US10324201B2 · kind B2 · utility

Assignee

• Siemens Healthcare Limited · DE

Inventors

• Martin Groepl · Sonthofen, DE
• Edgar Goederer · Forchheim, DE
• Thomas Suttorp · Munich, DE

Key dates

• Filing date: Sep 13, 2016
• Grant date: Jun 18, 2019
• Expiry date: Oct 29, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M1/808
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

An X-ray detector includes an N-channel digital-analogue converter controllable with K+L bits. In an embodiment, the digital-analogue converter includes a first voltage source to provide a plurality of first voltage values at tapping points; and a switch unit with N switch matrices, 2K inputs of the switch matrices being electrically conductively connected to 2K tapping points of the first voltage source. The digital-analogue converter also includes a second voltage source including N subunits. The X-ray detector further includes a discriminator unit including N comparators, at least one input of the comparators being electrically conductively connected to the associated output of the switch matrix and/or to the associated output of the subunit, so that the associated first voltage value and the associated second voltage value are associable with each comparator. A signal of an output of a pre-amplifier, and the associated first and second voltage values are comparable in the comparator.