Electronic switch
First Claim
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1. An electric switch, the electric switch comprising:
- a multigate field effect transistor having a plurality of gates, a drain and a source, the transistor having a first gate which is proximate to the drain and a second gate which is proximate to the source;
a first capacitor connecting the drain to the first gate; and
a second capacitor connecting the source to the second gate.
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Abstract
An electronic switch structure is disclosed. Capacitors are employed to bias gate-source and gate-drain connections in multi-gate or multi-FET structures achieving linear switch operation over a wide range of signal input power values.
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Citations
27 Claims
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1. An electric switch, the electric switch comprising:
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a multigate field effect transistor having a plurality of gates, a drain and a source, the transistor having a first gate which is proximate to the drain and a second gate which is proximate to the source;
a first capacitor connecting the drain to the first gate; and
a second capacitor connecting the source to the second gate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An electric switch, the switch comprising:
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a group of field effect transistors, each field effect transistor in the group having a gate, a drain and a source, the transistors connected in series source to drain first to last, wherein a signal flows into the source of the first transistor in the group of transistors and exits the drain of a last transistor in the group when a channel is formed, a control voltage having a high and a low state may be applied to a gate to open or close the channel;
a first capacitor connected between the gate and the source of the first transistor for keeping a voltage between the gate and the source of the first transistor below a pinch off voltage for the first transistor when a control voltage to close the channel is applied to the gate of the first transistor; and
a second capacitor connected between the gate and the drain of the last transistor for keeping the voltage at the gate of the last transistor below a pinch-off voltage for the last transistor when a control voltage to close the channel applied to the gate of the last transistor. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An electric switch, the electric switch comprising:
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a means for switching an electrical signal from an input terminal to an output terminal;
a means for reducing a first impedance between the input terminal and a first gate input of the switching means; and
a means for reducing a second impedance between the output terminal and a second gate input of the switching means.
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26. A method for creating an electric switch comprising:
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providing a first multigate transistor having at least a first gate and a last gate and a source and a drain;
electrically coupling a capacitor between the source and the first gate of the first multigate transistor;
electrically coupling a capacitor between the drain and the last gate of the first multigate transistor;
providing a second multigate transistor having at least a first gate and a last gate and a source and a drain. electrically coupling a capacitor between the source and the first gate of the second multigate transistor;
electrically coupling a capacitor between the drain and the last gate of the second multigate transistor.
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27. A method for creating an electric switch comprising:
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providing a first group of field effect transistors having at least a first transistor and a last transistor wherein each field effect transmitter has a source, a drain and a gate;
electrically coupling a capacitor between the source and the gate of the first field effect transistor in the first group;
electrically coupling a capacitor between the drain and the gate of the last field effect transistor in the first group;
providing a second group of field effect transistors having at least a first transistor and a last transistor wherein each field effect transmitter has a source, a drain and a gate;
electrically coupling a capacitor between the source and the gate of the first field effect transistor in the second group;
electrically coupling a capacitor between the drain and the gate of the last field effect transistor in the second group; and
electrically coupling the first group and the second group creating a transmission port.
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Specification