A current steering digital-to-analog converter and a current steering digital-to-analog conversion method

A technology of analog-to-analog converter and current steering digital, which is applied in the field of current steering digital-to-analog converter and current steering digital-to-analog conversion, which can solve the problems of shortened current turn-on time, loss of circuit efficiency, and increase of circuit power consumption, so as to avoid power consumption , small disturbance, and the effect of eliminating harmonic distortion

Active Publication Date: 2018-12-04
SANECHIPS TECH CO LTD
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Problems solved by technology

[0008] Figure 4 Although the RZ switching method eliminates the harmonic distortion caused by the above ISI, it will lose the efficiency of the circuit part because the current is only turned on for a part of a clock cycle; The speed requirements of the unit circuit, especially the subsequent I2V buffer, will increase with the shortening of the switching time, that is, the power consumption of the circuit will increase

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  • A current steering digital-to-analog converter and a current steering digital-to-analog conversion method
  • A current steering digital-to-analog converter and a current steering digital-to-analog conversion method
  • A current steering digital-to-analog converter and a current steering digital-to-analog conversion method

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[0045] In order to understand the characteristics and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present invention.

[0046] The current-steer digital-to-analog converter of the embodiment of the present invention is a novel equal-opportunity perturbation CS DAC, which generates two RZ current waveforms in one data period through two current switches at a clock frequency twice that of the digital data, whichever The results are summed and stitched into an approximate NRZ output waveform. Alternatively, a shuffle circuit is introduced into the switch logic control module, and by turning on and off the two current switches in turn, a rising edge is introduced into the current output corresp...

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Abstract

A current steering digital-to-analogue converter and a current steering digital-to-analogue conversion method, and a storage medium. The current steering digital-to-analogue converter comprises: a digital input circuit (51) configured to receive an input of digital data and send the digital data to a row decoder (52) and a column decoder (53); a shuffle circuit (54) connected to both the row decoder (52) and the column decoder (53), configured to generate a switch sequence and send the switch sequence to the row decoder (52) and the column decoder (53); the row decoder (52) and the column decoder (53) respectively connected to the digital input circuit (51), used for converting, in combination with the switch sequence, row data and column data of the digital data respectively into a corresponding thermometer code, and sending the converted thermometer code to a current source matrix (55); the current source matrix (55) configured to control, according to the received thermometer code, the turn-on and turn-off of a current and output current data; and a current-to-voltage converter (56) connected to the current source matrix (55) and configured to convert the current data into voltage data.

Description

technical field [0001] The invention relates to integrated circuit technology, in particular to a current steering digital-to-analog converter and a current steering digital-to-analog conversion method. Background technique [0002] The development of communication technology has put forward higher requirements for the speed and precision of digital-to-analog converters (DACs, Digital to Analog Converters). High-definition video and high-quality calls all require high-speed DACs. Current Steering Digital to Analog Converters (CS DAC, Current Steering Digital to Analog Converters) can effectively alleviate this contradiction. Different from DACs with other structures, CS DAC has a simple structure, consisting of a binary current source or a current source matrix, plus a current switch controlled by a binary number or a thermometer code controller converted by a decoder. The current of the current source can be switched to a resistor directly grounded by a switch (high-speed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/06H03M1/66
CPCH03M1/06
Inventor 易律凡赵春河
Owner SANECHIPS TECH CO LTD
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