The University of Southampton
University of Southampton Institutional Repository

Dada decoding

Dada decoding
Dada decoding

An arrangement for selecting the largest of a plurality of input currents (pma (k−1), pmb (k−1)) and adding a further current (Ibmk) to the selected current, the arrangement comprising: a plurality of inputs (901, 902) for receiving said input currents; a further input (905) for receiving said further current; an output (906, 907) for delivering an output current proportional to the sum of the largest of the input currents and the further current; means for feeding each of the received input currents to the main current conducting path of a respective transistor, (T900, T902) each of the transistors having its control electrode connected to a common point; a respective follower transistor (T901, T903) connected between the input and the common point; and a mirror transistor (T904) having its control electrode connected to the common point for producing a current whose value is related to that of the largest input current.
The currents through transistors (T904, T907) are summed and sensed by a diode connected transistor (T905) whose gate voltage is stored on a capacitor (C900, C901) by means of respective switches (S900, S901). The voltages across the capacitors (C900, C901) are fed via respective switches (S902, S903) to the gate electrodes of transistors (T908, T909) whose drain electrodes feed an output current (pmc (k−1)) to outputs (906, 907) of the arrangement.
A plurality of such arrangements are used for producing path metric currents for a Viterbi decoder.
US 6963625
Redman-White, William
d5376167-c925-460f-8e9c-13bffda8e0bf
Bramwell, Simon D.
f16e2503-6370-4da8-be3e-c7e9d486044c

Redman-White, William and Bramwell, Simon D. (Inventors) (2005) Dada decoding. US 6963625.

Record type: Patent

Abstract


An arrangement for selecting the largest of a plurality of input currents (pma (k−1), pmb (k−1)) and adding a further current (Ibmk) to the selected current, the arrangement comprising: a plurality of inputs (901, 902) for receiving said input currents; a further input (905) for receiving said further current; an output (906, 907) for delivering an output current proportional to the sum of the largest of the input currents and the further current; means for feeding each of the received input currents to the main current conducting path of a respective transistor, (T900, T902) each of the transistors having its control electrode connected to a common point; a respective follower transistor (T901, T903) connected between the input and the common point; and a mirror transistor (T904) having its control electrode connected to the common point for producing a current whose value is related to that of the largest input current.
The currents through transistors (T904, T907) are summed and sensed by a diode connected transistor (T905) whose gate voltage is stored on a capacitor (C900, C901) by means of respective switches (S900, S901). The voltages across the capacitors (C900, C901) are fed via respective switches (S902, S903) to the gate electrodes of transistors (T908, T909) whose drain electrodes feed an output current (pmc (k−1)) to outputs (906, 907) of the arrangement.
A plurality of such arrangements are used for producing path metric currents for a Viterbi decoder.

Full text not available from this repository.

More information

Published date: 8 November 2005

Identifiers

Local EPrints ID: 420287
URI: http://eprints.soton.ac.uk/id/eprint/420287
PURE UUID: 96dbfe91-44ed-46af-bfea-13b5ce355f9d

Catalogue record

Date deposited: 03 May 2018 16:30
Last modified: 11 Aug 2020 16:31

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×