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Differential switch circuit

A switch circuit, differential technology, applied in the field of differential switch circuit, can solve the problems affecting the operation performance of the circuit, and achieve the effect of low input loss and improved signal isolation

Active Publication Date: 2021-11-26
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional differential switch circuit is difficult to meet the two requirements of low input loss and high signal isolation, which often affects the overall circuit performance

Method used

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Embodiment Construction

[0026] Embodiments of the present invention will be described below in conjunction with related figures. In the drawings, the same reference numerals represent the same or similar elements or method flows.

[0027] figure 1 It is a simplified functional block diagram of the differential switch circuit 100 according to an embodiment of the present invention.

[0028] like figure 1 As shown, the differential switch circuit 100 includes a pair of differential signal input terminals composed of a first input terminal 112 and a second input terminal 114, and a first output terminal 122 and a second output terminal A pair of differential signal output terminals composed of 124. In addition, the differential switch circuit 100 further includes a switch signal receiving end 130 , a first transistor 140 , a second transistor 150 , a central switch element 160 , and a switch element control circuit 170 .

[0029] The switch signal receiving end 130 is used for receiving a switch s...

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Abstract

The present invention proposes a differential switch circuit, which includes: a first transistor, the first end of which is coupled to the first input end, the second end is coupled to the first output end, and the control end is coupled to the switch signal receiving end; The second transistor, its first terminal is coupled to the second input terminal, the second terminal is coupled to the second output terminal, and the control terminal is coupled to the switch signal receiving end; the central switching element is located between the first transistor and the second transistor on a signal path between the control terminals of the two crystals; and a switching element control circuit for controlling the central switching element according to the switching signal. When the switch signal turns on the first transistor and the second transistor, the switch element control circuit turns off the central switch element, and when the switch signal turns off the first transistor and the second transistor, the switch element control circuit turns on the center switch element.

Description

technical field [0001] The present invention relates to a switch circuit, in particular to a differential switch circuit having both advantages of low insertion loss and high signal isolation. Background technique [0002] The differential switch circuit is an important basic circuit in many circuit devices. Ideally, when the switch circuit is in the on state, the insertion loss of the signal should be as small as possible; and when the switch circuit is in the off state, the signal input terminal and the signal output terminal The higher the signal isolation, the better. [0003] However, the traditional differential switch circuit is difficult to meet the two requirements of low input loss and high signal isolation, which often affects the operation performance of the overall circuit. Contents of the invention [0004] In view of this, how to make the differential switch circuit have the advantages of low input loss and high signal isolation at the same time is a probl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/56H03K17/16
Inventor 陈柏羽陈力辅
Owner REALTEK SEMICON CORP