Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate
2011-04-12
2011-04-12
Nguyen, Linh V (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
C341S133000, C341S136000, C341S153000
Reexamination Certificate
active
07924196
ABSTRACT:
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 (200) which respectively include an intermediate storage cell (202) and a current cell (201) and which are adapted to feed a respective output current to a first (204) or a second output contact (206) in dependence on a logic state of the intermediate storage cell, wherein a first of two outputs of an intermediate storage cell (202) is connected by way of an input resistor (220) to a first signal terminal (208.1) of a first transistor (208) and a second of the two outputs of the intermediate storage cell (202) is connected by way of an input resistor (218) to a first signal terminal (210.1) of a second transistor (210), the respective first signal terminals of the first and second transistors are additionally connected by way of a constant current source (212and214) to a ground terminal (216), and wherein a respective time-constant bias voltage is applied at a respective control terminal (208.2and210.2) of the first and second transistors.
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IHP GmbH Innovations for High Performance Microelectronics/Leibn
Nguyen Linh V
Ware Fressola Van Der Sluys & Adolphson LLP
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