Switch and multiplexer including the same
First Claim
1. A switch being applicable to transmit a high frequency signal from an input terminal to an output terminal therethrough, and the switch comprising:
- a switch device, connected between the input terminal and the output terminal, and comprising a control terminal and configured to be switched between ON and OFF according to a switch controlling signal provided to the control terminal; and
a variable resistor, connected to the control terminal and configured to be changed to a first resistance while the switch device is ON, and to be changed to a second resistance while the switch device is OFF according to a resistor controlling signal, wherein the first resistance is higher than the second resistance, and the resistor controlling signal is changed corresponding to the switch controlling signal;
wherein the switch device is a transmission gate consisted of an n-type metal-oxide-semiconductor field effect transistor and a p-type metal-oxide-semiconductor field effect transistor, and the control terminal comprises a gate of the n-type metal-oxide-semiconductor field effect transistor and a gate of the p-type metal-oxide-semiconductor field effect transistor.
1 Assignment
0 Petitions
Accused Products
Abstract
A switch and a multiplexer including the same are provided, which are applicable to selectively transmit the high frequency signal from an input terminal to an output terminal therethrough. The switch includes a switch device and a variable resistor. The switch device is connected between the input terminal and the output terminal, and the switch device includes a control terminal and is configured to be switched between ON and OFF according to a switch controlling signal provided to the control terminal. The variable resistor is connected to the control terminal and configured to change to a first resistance while the switch device is ON, and to change to a second resistance while the switch device is OFF according to a resistor controlling signal. The first resistance is higher than the second resistance, and the resistor controlling signal is changed corresponding to the switch controlling signal.
3 Citations
16 Claims
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1. A switch being applicable to transmit a high frequency signal from an input terminal to an output terminal therethrough, and the switch comprising:
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a switch device, connected between the input terminal and the output terminal, and comprising a control terminal and configured to be switched between ON and OFF according to a switch controlling signal provided to the control terminal; and a variable resistor, connected to the control terminal and configured to be changed to a first resistance while the switch device is ON, and to be changed to a second resistance while the switch device is OFF according to a resistor controlling signal, wherein the first resistance is higher than the second resistance, and the resistor controlling signal is changed corresponding to the switch controlling signal; wherein the switch device is a transmission gate consisted of an n-type metal-oxide-semiconductor field effect transistor and a p-type metal-oxide-semiconductor field effect transistor, and the control terminal comprises a gate of the n-type metal-oxide-semiconductor field effect transistor and a gate of the p-type metal-oxide-semiconductor field effect transistor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A multiplexer being applicable to transmit a high frequency signal from one of a first input terminal and a second input terminal to an output terminal therethrough, and the multiplexer comprising:
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a first switch device, connected between the first input terminal and the output terminal, and comprising a first control terminal and configured to be switched between ON and OFF according to a first switch controlling signal provided to the first control terminal; a second switch device, connected between the second input terminal and the output terminal, and comprising a second control terminal and configured to be switched between ON and OFF according to a second switch controlling signal provided to the second control terminal, wherein ON and OFF of the first switch device and ON and OFF of the second switch device are mutually exclusive; a first variable resistor, connected to the first control terminal and configured to be changed to a first resistance while the first switch device is ON, and to be changed to a second resistance while the first switch device is OFF according to a first resistor controlling signal, wherein the first resistance is higher than the second resistance, and the first resistor controlling signal is changed corresponding to the first switch controlling signal; and a second variable resistor, connected to the second control terminal and configured to be changed to a third resistance while the second switch device is ON, and to be changed to a fourth resistance while the second switch device is OFF according to a second resistor controlling signal, wherein the third resistance is higher than the fourth resistance, and the second resistor controlling signal is changed corresponding to the second switch controlling signal; wherein the first switch device is a first transmission gate consisted of a first n-type metal-oxide-semiconductor field effect transistor and a first p-type metal-oxide-semiconductor field effect transistor, and the first control terminal comprises a gate of the first n-type metal-oxide-semiconductor field effect transistor and a gate of the first p-type metal-oxide-semiconductor field effect transistor, and the second switch device is a second transmission gate consisted of a second n-type metal-oxide-semiconductor field effect transistor and a second p-type metal-oxide-semiconductor field effect transistor, and the second control terminal comprises a gate of the second n-type metal-oxide-semiconductor field effect transistor and a gate of the second p-type metal-oxide-semiconductor field effect transistor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification