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Gate voltage bootstrap switch and fully-differential high-linearity voltage control attenuator formed by same

A gate voltage bootstrap and attenuator technology, which is applied in electronic switches, logic circuits with logic functions, electrical components, etc., can solve the problems of excessive capacitance area and clock circuit complexity, and solve the problems of excessive capacitance area, Effects that remove non-linearities, are easy to implement and apply

Active Publication Date: 2019-11-05
西安电子科技大学重庆集成电路创新研究院
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Problems solved by technology

[0005] Compared with the prior art, the present invention has the following technical effects: the gate-source voltage of the main switching tube MS is maintained at a constant voltage during normal operation of the switch, which effectively eliminates the nonlinearity of the on-resistance; it can be realized by using CMOS, BiCMOS and other technologies , easy to implement and apply; this circuit is suitable for semiconductor integrated circuits, effectively solving the problems of excessive capacitor area, circuit complexity caused by clocks, channel charge injection, and clock feedthrough effects

Method used

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  • Gate voltage bootstrap switch and fully-differential high-linearity voltage control attenuator formed by same
  • Gate voltage bootstrap switch and fully-differential high-linearity voltage control attenuator formed by same
  • Gate voltage bootstrap switch and fully-differential high-linearity voltage control attenuator formed by same

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Embodiment Construction

[0013] Combine below Figure 1 to Figure 4 , the present invention is described in further detail.

[0014] refer to figure 1 , a gate voltage bootstrap switch, including a plurality of transistors and a capacitor C1, the sources of the transistors M3, M5, M11, M12 and the gate of the transistor M9 are connected to the power supply VDD, the gates of the transistors M3, M4 and the transistors M12, The drains of M13 are connected, the drains of transistors M3 and M4 are connected to the gate of transistor M7, the drain of transistor M5, the substrate and source of transistor M7 are connected to the positive plate of capacitor C1, the source of transistor M4, the transistor The drains of M6 and M8 are connected to the negative plate of capacitor C1, the gates of transistors M5, M8, MS and the drains of transistors M7, M9 are connected, the source of transistor M9 is connected to the drains of transistors M10, M11, and the transistors The sources of M6, M10, and M13 are grounded...

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Abstract

The invention particularly relates to a gate voltage bootstrap switch and a fully differential high-linearity voltage control attenuator formed by the same, the gate voltage bootstrap switch is composed of a plurality of transistors and a capacitor C1, and the attenuator comprises a decoder, a resistor, transistors M1 and M2 and attenuation units; there are a plurality of attenuation units. Each attenuation unit is composed of two gate voltage bootstrap switches. A digital control signal is divided into a plurality of branches after passing through the decoder, one branch is connected with grids of the transistors M1 and M2 to control on-off of the transistors M1 and M2, and each of the rest branches is connected with a clock control signal port of one attenuation unit to control on-off ofthe attenuation unit. A gate voltage bootstrap switch working in an on state is used as an attenuation network formed by resistors, attenuation gain of the attenuator is controlled through digital signals, and the attenuator has good linearity in a working frequency band by using the gate voltage bootstrap switch as the attenuation network formed by linear resistors.

Description

technical field [0001] The invention relates to the technical field of analog integrated circuits, in particular to a grid voltage bootstrap switch and a fully differential high linearity voltage control attenuator formed therefrom. Background technique [0002] The attenuator is an important part of the analog signal processing front-end circuit, and it usually adjusts the gain of the analog front-end system together with the amplifier in the signal path. At the same time, the attenuator can also properly attenuate the signal to meet the requirements of the next-level network on the signal input amplitude during normal operation. The voltage-controlled attenuator can change the attenuation gain of the attenuator by changing the control voltage. In the integrated circuit design, the MOS transistor working in the deep linear region can be used as a resistor to form a gain attenuation network to attenuate the signal. Through the gate voltage Controlling the on and off of the ...

Claims

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Application Information

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IPC IPC(8): H03K19/003H03K17/687H03K19/20
CPCH03K17/687H03K19/00384H03K19/20
Inventor 于欣炜李迪杨毅甘晓文李振国乌恒洋
Owner 西安电子科技大学重庆集成电路创新研究院
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