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DAC with local interleaving and resampling

一种数模转换器、转换器的技术，应用在数字模拟转换器、模/数转换、代码转换等方向，达到减小设计限制的效果

Active Publication Date: 2021-12-10
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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  • DAC with local interleaving and resampling
  • DAC with local interleaving and resampling
  • DAC with local interleaving and resampling

Examples

Experimental program
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Effect test

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 with local interleaving and resampling. The invention relates to a digital-to-analog converter and a method for digital-to-analog conversion, wherein the digital-to-analog converter comprises at least one analog output unit configured to respond to a part of a digital input signal Instead, a portion of the analog signal is selectively generated. The analog output unit includes an analog output switching unit and switching logic, the analog output switching unit includes: a current source connected in series to the first node of the retiming switch; and a first switching element and a second switching element , both the first switching element and the second switching element are connected in parallel to the second node of the retiming switch through the first node, and the switching logic is configured to regulate the transmission of the part of the analog signal towards the output of the analog unit.

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 Patents(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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