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Multi-channel sampling grid voltage bootstrapping switch suitable for streamline type analog-digital converter

An analog-to-digital converter and gate voltage bootstrapping technology, which is used in analog-to-digital conversion, code conversion, instruments, etc., can solve the problem that the off-state resistance is not infinite, and achieve area saving, guarantee simultaneity, and accurate simultaneous sampling. Effect

Inactive Publication Date: 2015-01-07
SOUTHEAST UNIV
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Problems solved by technology

In the actual MOS process implementation, the on-resistance of the switch is not zero, and the off-state resistance is not infinite.
The internal parasitic capacitance of the MOS tube will also affect the high-frequency characteristics of the switch. At the same time, the clock signal added to the gate of the MOS switch will cause the MOS switch to exhibit nonlinearity due to the influence of charge injection and clock feedthrough.

Method used

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  • Multi-channel sampling grid voltage bootstrapping switch suitable for streamline type analog-digital converter

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Such as figure 1 Shown is a multi-channel sampling gate voltage bootstrap switch for a pipelined ADC, including a clock multiplication circuit, two gate voltage bootstrap circuits (the first gate voltage bootstrap circuit and the second gate voltage bootstrap circuit) and two gate voltage conduction switches (the first gate voltage conduction switch and the second gate voltage conduction switch); all gate voltage bootstrap circuits share a clock multiplication circuit, and each gate voltage bootstrap The circuit drives a gate voltage conduction switch, that is, the output terminal of the clock multiplication circuit is simultaneously connected to the input terminals of all gate voltage bootstrap circuits, and the output terminal of each gate voltage bootstrap circuit is connected to a gate voltage conduction switch.

[0015] The clock multiplication circuit inc...

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Abstract

The invention discloses a multi-channel sampling grid voltage bootstrapping switch suitable for a streamline type analog-digital converter. Compared with a traditional grid voltage bootstrapping switch, on the basis of an original clock multiplying circuit and a grid voltage bootstrapping circuit, another grid voltage bootstrapping circuit is added, a sampling switch is arranged correspondingly, meanwhile, the added grid voltage bootstrapping circuit and the original grid voltage bootstrapping circuit share the clock multiplying circuit, accordingly, compared with a plurality of original separated grid voltage bootstrapping switches, a certain area is saved, meanwhile, the synchroneity of various clocks is guaranteed, and simultaneous sampling of multi-channel differential signals can be achieved.

Description

technical field [0001] The invention relates to a grid voltage bootstrap switch capable of simultaneous sampling of multiple differential signals, which is suitable for high-speed and high-precision pipelined analog-to-digital conversion circuits, and belongs to the digital-analog hybrid integrated circuit technology. Background technique [0002] The on-state resistance of an ideal switch is zero, and the off-state resistance is infinite. Especially in switched capacitor circuits, the requirements on the on-state resistance of the switch are relatively high. In actual MOS process implementation, the on-resistance of the switch is not zero, and the off-state resistance is not infinite. The internal parasitic capacitance of the MOS tube will also affect the high-frequency characteristics of the switch. At the same time, the clock signal applied to the gate of the MOS switch will cause the MOS switch to appear nonlinear due to the influence of charge injection and clock feedth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/54
Inventor 吴建辉汤旭婷郭娜李红黄成薛金炜林志伦
Owner SOUTHEAST UNIV
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