Switch, tuner of antenna and radio frequency device

Abstract

The embodiment of the invention discloses a switch, a tuner of an antenna and a radio frequency device, and therefore transmission efficiency of the switch comprising a plurality of series transistors is adjusted comprehensively, and a leakage current is restrained. The switch comprises the 2N transistors which are sequentially connected in series. According to the 2N transistors which are sequentially connected in series, the control ends of any two transistors with the odd sequence numbers closest to each other are coupled through a first resistor, and the control ends of any two transistors with the even sequence numbers closest to each other are coupled through a second resistor; the control end of the nth transistor is coupled to a first control signal in switch control signals, and the control end of the (n+1)th transistor is coupled to the first control signal, wherein n is an integer which is greater than or equal to one and less than or equal to 2N-1, N is an integer greater than or equal to two, and the first control signal is used for controlling switching-on or switching-off of the switch.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a switch, an antenna tuner and a radio frequency device. Background technique [0002] With the development of wireless communication technology, mobile communication devices usually need to support multi-mode and multi-band requirements, which requires that on mobile communication devices, an antenna must not only support switching from transmitting mode to receiving mode, but also need to meet multiple mode and multiband requirements. [0003] In the radio frequency device, there is a transmission link and a reception link, and the transmission link and the reception link may be collectively referred to as a radio frequency processing module. When the radio frequency processing module decides to do at least one of signal transmission and signal reception, at least one of the transmission chain and the reception chain needs to be selectively connected to the antenna, and th...

AI Technical Summary

Problems solved by technology

But for a transistor close to the input terminal, as the number of series resistors coupled to the control terminal increases, the signal transmission delay from the control terminal to the gate of the transistor will increase, thereby reducing the transmission efficiency of the entire switch

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