Ihp Gmbh-innovations for High Performance Microelectronics/institut Fur Innovative Mikroelektronik

Ihp Gmbh Innovations for High Performance Microelectronics/leibniz Institut for Innovative Mikroelektronik

Hans Gustat

A parallel digital-analog converter for the conversion of a plurality of differential digital input signals into a differential analog output signal, including a group of 1-bit digital-analog converters () which respectively include an intermediate storage cell () and a current cell () and which are adapted to feed a respective output current to a first () or a second output contact () in dependence on a logic state of the intermediate storage cell, wherein a first of two outputs of an intermediate storage cell () is connected by way of an input resistor () to a first signal terminal () of a first transistor () and a second of the two outputs of the intermediate storage cell () is connected by way of an input resistor () to a first signal terminal () of a second transistor (), the respective first signal terminals of the first and second transistors are additionally connected by way of a constant current source (and) to a ground terminal (), and wherein a respective time-constant bias voltage is applied at a respective control terminal (and) of the first and second transistors.

Digital-analog converter

The invention concerns an electronic circuit comprising a sigma-delta modulator and a power amplifier connected downstream thereof, wherein there is provided a feedback circuit () which is coupled between an output of the sigma-delta modulator and an input of the sigma-delta modulator and which includes an emulation of the signal path between the output of the sigma-delta modulator and the output of a power amplifier () connected downstream of said sigma-delta modulator.

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Heidesee, Germany

Hans Gustat