Converter for converting thermometer code and its method

Abstract

The invention relates to an arrangement for converting a binary input signal corresponding to an n-bit thermometer code into a binary output code different therefrom, having a first number of OR gate circuits, into the inputs of which bits of the thermometer code can be coupled, having a first adder, which is connected downstream of the OR gate circuits and into the inputs of which the output signals of the OR gate circuits can be coupled and which provides at least one binary output signal for the output code at its outputs, having a second number of multiplexer circuits, into the inputs of which bits of the thermometer code can be coupled and into the multiplexer selection terminals of which the output signals of the first adder can be coupled, having a second adder, which is connected downstream of the multiplexer circuits and into the inputs of which the output signals of the multiplexer circuits can be coupled and which provides at least one further binary output signal for the output code at its outputs. The invention furthermore relates to a conversion method.

Description

technical field [0001] The invention relates to a conversion device and method for converting a binary input signal corresponding to an n-bit thermometer code into a binary output code different from the input signal. Background technique [0002] EP 0 221 238 A2 describes a thermometer-binary encoder in which the thermometer code to be converted is divided into subgroups of J K bits and each subgroup is individually converted into a binary code. In this case, a single thermometer-binary encoder for each subgroup consists of eg a first number of "AND" gates followed by a second number of "OR" gates. The binary output codes of the individual thermometer-binary encoders for each subgroup are summed in an addition stage and thus produce a final binary output code of 7-bit width. [0003] A thermometer code is a digital code that ideally consists of a sequence of binary ones followed by a sequence of binary zeros, and vice versa. Thus the thermometer code ideally does not cont...

AI Technical Summary

Problems solved by technology

[0015] The disadvantage of such an error cancellation circuit is mainly that it requires additional circuit outlay for error cancellation in addition to a considerable circuit outlay for the converter

However, the additional circuit outlay required for this is detrimental to the performance of the conversion circuit, especially in this case the rapidity, so that such a conversion circuit is only suitable for converting thermometer codes with a small number of bits.

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