Digital-to-analog converter with local interleaving and resampling

A digital-to-analog converter, converter technology, applied in the direction of digital-to-analog converter, analog-to-digital conversion, code conversion, etc., to achieve the effect of simplifying generation, reducing thermal gradient, and reducing size

Active Publication Date: 2017-01-18
ROHDE & SCHWARZ GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in additional distortion on the signaling path

Method used

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  • Digital-to-analog converter with local interleaving and resampling
  • Digital-to-analog converter with local interleaving and resampling
  • Digital-to-analog converter with local interleaving and resampling

Examples

Experimental program
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Embodiment Construction

[0057] figure 1 A first exemplary embodiment of a DAC 1 according to the invention is shown. The DAC 1 includes a plurality of digital input ports 2 . At digital input port 2, multiple digital input signals are applied. For reasons of simplicity, only four digital input signals DIG_1 , DIG_2 , DIG_3 and DIG_4 are shown. Each of the digital input signals DIG_1 , DIG_2 , DIG_3 and DIG_4 is binary nominal and is provided to the encoder unit 4 . Downstream of the encoder unit 4 four analog output units 5 are arranged to selectively generate partial analog signals ANA_1 , ANA_2 , ANA_3 and ANA_4 in response to the digital input signals DIG_1 , DIG_2 , DIG_3 and DIG_4 . The analog output signals ANA_1 , ANA_2 , ANA_3 and ANA_4 are supplied to a summation unit 6 . In a summation unit 6 the partial analog signals ANA_1 , ANA_2 , ANA_3 and ANA_4 are summed to obtain an analog output signal analog_out at the analog output port 3 of the DAC 1 .

[0058] The encoder unit 4 of the DAC...

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Abstract

The invention relates to a digital to analog converter and a method for a digital to analog conversion, wherein the digital to analog converter comprises at least one analog output cell configured to selectively generate a partial analog signal in response to a partial digital input signal. The analog output cell comprises an analog output switching unit that comprises a current source connected in series to a first node of a retiming switch and a first switch element as well as a second switching element, both connected with respect to first nodes in parallel to a second node of the retiming switch and a switching logic configured to regulate the transmission of said partial analog signal to an analog cell output.

Description

technical field [0001] The present invention relates to a digital-to-analog converter (DAC for short) for converting a digital input signal into an analog signal. The invention also relates to a method for digital-to-analog conversion. [0002] Today, high-speed, high-dynamic-range DACs are key to radio frequency (RF for short), signal generation for wireless and wired networks, digital terrestrial television, cellular communications, software-defined radio, radar, and test and measurement application. [0003] The use of a high-speed, high-dynamic-range DAC allows direct digital synthesis without intermediate analog circuit functions (eg, mixers), resulting in fewer mixing products, fewer spurious signals, and reduced signal distortion. These DACs allow new signal synthesis applications in test equipment, especially when RF signals require precise harmonic generation up to higher orders (such as the fifth harmonic or higher). Background technique [0004] There are vario...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/68H03M1/08
CPCH03M1/0863H03M1/68H03M1/0624H03M1/1215H03M1/0872H03M1/742
Inventor 拉杜·费舍费伊·荣格马克·莱纳
Owner ROHDE & SCHWARZ GMBH & CO KG
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