High frequency switch circuit having reduced input power distortion
First Claim
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1. A switch circuit, comprising:
- a first transistor connected in series between input and output terminals;
a control terminal that receives a signal to control a conductive state of the transistor;
a first resistor connected between a control electrode of the transistor and the control terminal; and
a series circuit comprising;
a first diode and a second resistor, the series circuit being connected in parallel with the first resistor between the control terminal and the control electrode of the transistor, anda second diode serially connected to said first diode.
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Abstract
There has been a problem that the distortion characteristic of a switch circuit for a high frequency is deteriorated. A switch circuit in accordance with one aspect of the present invention includes a transistor connected in series between input and output terminals, a control terminal that receives a signal to control the conductive state of the transistor, a first resistor connected between the control electrode of the transistor and the control terminal, and a series circuit of a diode and a second resistor, the series circuit being connected in parallel with the first resistor between the control terminal and the control electrode of the transistor.
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Citations
16 Claims
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1. A switch circuit, comprising:
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a first transistor connected in series between input and output terminals; a control terminal that receives a signal to control a conductive state of the transistor; a first resistor connected between a control electrode of the transistor and the control terminal; and a series circuit comprising; a first diode and a second resistor, the series circuit being connected in parallel with the first resistor between the control terminal and the control electrode of the transistor, and a second diode serially connected to said first diode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A switch circuit, comprising:
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a transistor having a source associated with a first node, a drain associated with a second node, and a control electrode associated with a third node; an input terminal associated with the first node; an output terminal associated with the second node; a control terminal associated with a fourth node; a first resistor provided between the third node and fourth node; and a series circuit associated with the third node, said series circuit comprising; a second resistor provided between the third node and fourth node and in parallel with the first resistor; a first diode provided between the third node and fourth, node, said first diode being provided in parallel with the first resistor and in series with the second resistor; and a second diode provided between the third node and fourth node and in parallel with the first resistor and in series with the first diode. - View Dependent Claims (11)
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12. A semiconductor device, comprising:
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an input terminal; an output terminal; a plurality of switch circuits, said plurality of switch circuits being provided in series between the input port and the output port, each of said switch circuits comprising; a transistor having a source associated with a first node, a drain associated with a second node, and a control electrode associated with a third node; an input terminal associated with the first node; an output terminal associated with the second node; a control terminal associated with a fourth node; and a first resistor provided between the third node and fourth node; and a plurality of series circuits associated with a respective third node of a respective one of the plurality of switch circuits, each of said series circuits comprising; a second resistor provided between the third node and fourth node and in parallel with the first resistor; a first diode provided between the third node and fourth node, said first diode being provided in parallel with the first resistor and in series with the second resistor; and a second diode provided between the third node and fourth node and in parallel with the first resistor and in series with the first diode, wherein, in a first switch circuit of the plurality of switch circuits, said first node is associated the input terminal of the semiconductor device, wherein, in a final switch circuit of the plurality of switch circuits, said second node is associated the output terminal of the semiconductor device, and wherein, in between respective consecutive switch circuits of the plurality of switch circuits, a respective second node is associated with a first node of a following switch circuit. - View Dependent Claims (13, 14)
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15. A semiconductor device, comprising:
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an input terminal; an output terminal; a control terminal associated with a fourth node; a plurality of switch circuits, said plurality of switch circuits being provided in series between the input port and the output port, each of said switch circuits comprising; a transistor having a source associated with a first node, a control electrode, and a drain associated with a second node; an input terminal associated with the first node; and an output terminal associated with the second node; a third node being connected in common with one end of each control electrode resistor, the other end of each control electrode resistor being connected to each control electrode of each transistor of said plurality of switch circuits; a first resistor provided between the third node and the fourth node; and a series circuit associated with the third node, said series circuit comprising; a second resistor provided between the third node and fourth node and in parallel with the first resistor; a first diode provided between the third node and fourth node, said first diode being provided in parallel with the first resistor and in series with the second resistor; and a second diode provided between the third node and fourth node and in parallel with the first resistor and in series with the first diode. - View Dependent Claims (16)
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Specification