Analog switch for signal swinging between positive and negative voltages
First Claim
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1. An analog switch comprising:
- an input terminal via which an analog switch is input;
an output terminal via which the analog signal is output;
a first N-channel MOSFET (Metal Oxide Semiconductor Field Effect Transistor) provided between the input terminal and the output terminal;
a first diode provided between the gate of the first MOSFET and a first fixed voltage terminal, such that the cathode thereof is arranged on the gate side of the first MOSFET;
a second MOSFET which is a P-channel MOSFET provided between the input terminal and the output terminal; and
a second diode provided between the gate of the second MOSFET and a second fixed voltage terminal, such that the anode thereof is arranged on the gate side of the second MOSFET.
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Abstract
An analog signal is input to an input terminal. An analog signal is output via an output terminal. A first transistor is an N-channel MOSFET, and is provided between the input terminal and the output terminal. A first resistor is provided between the gate of the first transistor and a first fixed voltage terminal (power supply terminal), which sets the gate of the first transistor to a high-impedance state.
32 Citations
1 Claim
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1. An analog switch comprising:
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an input terminal via which an analog switch is input; an output terminal via which the analog signal is output; a first N-channel MOSFET (Metal Oxide Semiconductor Field Effect Transistor) provided between the input terminal and the output terminal; a first diode provided between the gate of the first MOSFET and a first fixed voltage terminal, such that the cathode thereof is arranged on the gate side of the first MOSFET; a second MOSFET which is a P-channel MOSFET provided between the input terminal and the output terminal; and a second diode provided between the gate of the second MOSFET and a second fixed voltage terminal, such that the anode thereof is arranged on the gate side of the second MOSFET.
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Specification
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Current AssigneeROHM Co., Ltd.
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Original AssigneeROHM Co., Ltd.
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InventorsNakahara, Hironori, Horiuchi, Sachito
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Primary Examiner(s)Wells, Kenneth B.
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Application NumberUS13/237,133Publication NumberTime in Patent Office196 DaysField of Search327/308, 327/434, 333/81.RUS Class Current327/308CPC Class CodesH03K 17/063 in field-effect transistor ...
