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Switch circuit

A switching circuit and switching technology, applied in the direction of electronic switches, electrical components, pulse technology, etc., can solve problems such as limiting the linearity of linear circuits

Active Publication Date: 2011-08-10
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the switching circuit is used in a linear circuit (such as a filter or an amplifier), it will limit the linearity of the linear circuit

Method used

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Embodiment Construction

[0030] The aforementioned and other technical contents, features and functions of the present invention will be clearly presented in the following detailed description of three embodiments with reference to the accompanying drawings.

[0031] Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

[0032] refer to image 3 , The first embodiment of the switch circuit of the present invention includes two metal oxide semiconductor switches 31 , 32 and an adjustment unit 5 . Each metal-oxide-semiconductor switch 31, 32 includes an input terminal and an output terminal, and in this embodiment, it is an N-type metal-oxide-semiconductor switch, but in other embodiments, it can be a P-type metal oxide semiconductor switch. semiconductor switch or a complementary metal oxide semiconductor switch. The two MOS switches 31, 32 receive a pair of differential input voltages V...

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Abstract

The invention provides a switching circuit which can adjust linearity. The switching circuit comprises two metal oxide semiconductor switches and an adjusting unit. A pair of differential input voltages is received at the input terminals of the two metal oxide semiconductor switches, and a pair of differential output voltages is output at the output terminals of the two metal oxide semiconductor switches when in conduction. The adjusting unit changes the difference of a common-mode level of the input terminals and the output terminals of the two metal oxide semiconductor switches, thus adjusting the linearity of differential mode resistances of the two metal oxide semiconductor switches.

Description

technical field [0001] The invention relates to a switch circuit, in particular to a switch circuit capable of adjusting linearity. Background technique [0002] The existing switching circuit for transmitting differential voltage includes two metal oxide semiconductor switches (MOSSwitch), wherein each metal oxide semiconductor switch includes an input terminal and an output terminal, and can be an N-type metal oxide semiconductor switch. switch (NMOS Switch), a P-type metal-oxide-semiconductor switch (PMOS Switch), or a complementary metal-oxide-semiconductor switch (CMOS Switch). The two MOS switches receive a pair of differential input voltages Vin+, Vin- at their input terminals, and output a pair of differential output voltages Vout+, Vout- at their output terminals when turned on. [0003] figure 1 and figure 2 The relevant simulation results of the switch circuit 1 are shown, wherein, the horizontal axis represents the difference Vdiff of the pair of differential...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/687
Inventor 李朝政刘仁杰
Owner REALTEK SEMICON CORP
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