Dynamic reset double-edge switch driving circuit and method suitable for ultra-high-speed DAC

Abstract

The invention relates to a dynamic reset double-edge switch driving circuit and method suitable for an ultra-high-speed DAC, belongs to the technical field of data converters, and solves the problemsof output signal distortion and current steering DAC dynamic performance reduction caused by inter-symbol interference possibly caused by common source node voltage fluctuation of a traditional current switch driving circuit. The switch driving circuit comprises a first driving branch, a second driving branch, a first reset transistor M4, a second reset transistor M8 and a transistor M0, and the first driving branch and the second driving branch are used for alternately realizing double-edge alternate sampling of the digital signal. By means of the switch driving circuit, resetting of common-source node voltage of the relative branch is achieved, the switch driving circuit is simple, easy to implement and easy to implement, fluctuation of the common-source node voltage is reduced, distortion of output signals is avoided, the dynamic performance of the current steering DAC is improved, and the switch driving circuit has high practical value.

Description

technical field [0001] The invention relates to the technical field of data converters, in particular to a dynamic reset double-edge switch drive circuit and method suitable for ultra-high-speed DACs. Background technique [0002] Ultra-high-speed digital-to-analog converter (DAC) has broad application prospects in broadband wireless communication, test equipment, radar and other fields. The current-steer architecture can provide faster switching speed and greater bandwidth, so it is usually the structure of choice for ultra-high-speed DACs. Although the current steering DAC structure is relatively simple, the performance is still limited by errors from various sources, such as amplitude errors caused by current source mismatches, switching transient behavior related to input digital signals, and finite output impedance caused by parasitic capacitances. [0003] The basic structure of the current steering DAC is composed of a group of weighted current sources and current sw...

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Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide a dynamic reset dual-edge switch drive circuit and method suitable for ultra-high-speed DACs, to solve the intersymbol crosstalk that may be caused by the common source node voltage fluctuation of the traditional current switch drive circuit , resulting in output signal distortion and the degradation of the dynamic performance of the current steering DAC

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