1-bit digital-analog converter to convert digital information into current and voltage pulses
AssigneeSiemens Aktiengesellschaft
InventorHelmut Kling
Life of this patent
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Abstract
A 1-bit digital-analog converter has outputs, switching units and pulse shaping units, with outputs, switching unit and the pulse shaping units being decoupled from one another by decoupling units. In addition, a 1-bit digital-analog converter has one or two outputs, two inputs, a switching unit and pulse shaping units, with each input being produced in a pair, and for each switching unit a second switching unit is arranged such that each bit change of the input bit fundamentally forces a switching operation. In addition, in the case of the current circuit i, the current i is regulated to virtually or actually zero, while in the case of the voltage circuit the corresponding voltage difference is regulated to virtually or actually zero.
Claims32
A 1-bit digital-analog converter comprising:
- two inputs;
- at least one output;
- at least one pulse shaping unit;
- switching units to selectively couple the at least one output to the at least one pulse shaping unit based on signals at the two inputs;
- and
- a decoupling unit formed by cascade isolation stages operated with a bias current to decouple the outputs, the switching units and the at least one pulse shaping unit from one another.
A 1-bit digital-analog converter comprising:
- two pairs of inputs;
- at least one output;
- at least one pulse shaping unit;
- two pairs of switching units controlled respectively by the two pairs of inputs, to selectively couple the at least one output to the at least one pulse shaping unit based on signals at the two pairs of inputs, where each change of an input bit forces a switching operation.
A 1-bit digital-analog converter comprising:
- two inputs;
- at least one output;
- a pulse shaping device comprising one of:
- a pair of voltage pulse shaping units producing voltages controlled where during a switching operation of the two inputs, a voltage difference between the voltages is a constant value not influenced by a data sequence, and
- a current pulse shaping unit producing a current controlled where during the switching operation of the two inputs, the current is a constant value not influenced by the data sequence;
- and
- switching units performing the switching operation by selectively coupling the at least one output to the pulse shaping device based on signals at the two inputs.
A 1-bit digital-analog converter, comprising:
- two pairs of inputs;
- an output;
- a pulse shaping unit;
- switching units to selectively couple the output to the pulse shaping unit based on signals at the two pairs of inputs;
- and
- decoupling units to decouple the outputs, the switching units and the pulse shaping unit from one another, wherein the decoupling units and the switching units are formed as cascade isolation stages where at least one isolation stage is operated with a bias current.
Dependencies are inferred from the claim text.