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Switching device

A switching device, switching circuit technology, applied in electronic switches, electrical components, pulse technology and other directions, can solve the problems of difficult switching, complex circuit structure, etc.

Active Publication Date: 2012-05-09
MEDIATEK SINGAPORE PTE LTD SINGAPORE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the circuit structures of the receiver and the transmitter are quite complicated, it is necessary to manufacture a device that meets the above characteristics and can withstand the maximum radio frequency input signal that the receiver can accept and / or the transmitter can produce. The switching of the maximum RF output signal is actually quite difficult

Method used

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Embodiment Construction

[0012] Certain terms are used throughout the description to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. In this specification, the difference in names is not used as a way to distinguish components, but the difference in function of components is used as a criterion for distinguishing. "Includes" mentioned throughout the specification is an open-ended term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" here includes any direct and indirect means of electrical connection. Therefore, if it is described in the text that a first device is coupled to a second device, it means that the first device can be directly electrically connected to the second device. second device, or indirectly electrically connected to the second device through other devices or connection means.

[0013] Please refer to figure 1 , figure 1 It ...

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Abstract

A switching device includes: a first switching circuit, having a control node coupled to a first control signal, and arranged to selectively couple a signal node to a first amplifying circuit according to the first control signal; and a first control circuit, having a first control node and a second control node coupled to the control node of the first switching circuit and the signal node, respectively, wherein when the first switching circuit is controlled to electrically disconnect the signal node from the first amplifying circuit and a voltage level of the signal node reaches a first predetermined voltage level, the first control circuit is arranged to make the control node of the first switching circuit electrically connected to the signal node. The switching device in the invention can process large-swing signals so as to bearing a maximal radio frequency input signal capable of being received by a receiver and / or a maximal radio frequency input signal capable of being produced by a transmitter.

Description

technical field [0001] The present invention relates to a switch device, in particular to a switch device capable of processing large swing signals. Background technique [0002] In a wireless communication system, such as a frequency modulation transceiver, the receiver and the transmitter of the frequency modulation transceiver share the same antenna. Therefore, when the wireless communication system is in normal operation, a switch is used to couple the antenna to the receiver, or to couple the antenna to the transmitter. According to the practice of a traditional wireless communication system, the switch is connected in series with the receiver instead of the transmitter, which is due to the signal distortion and out-of-band emission (Out-of-band) of the transmitter. emission) is more stringent than the receiver's requirements for signal linearity. For example, in a receiving signal mode, when the switch is turned on (that is, short-circuited), the switch should have c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/722
CPCH03K17/687
Inventor 陈运洲乌萨马·K·A·萨那
Owner MEDIATEK SINGAPORE PTE LTD SINGAPORE