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Switch semiconductor integrated circuit and communication terminal device

  • US 5,812,939 A
  • Filed: 08/01/1996
  • Issued: 09/22/1998
  • Est. Priority Date: 08/10/1995
  • Status: Expired due to Term
First Claim
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1. A switch semiconductor integrated circuit comprising:

  • a first field-effect transistor stage which is connected in series to a first signal path for communicating between a first signal terminal and a second signal terminal;

    a second field-effect transistor stage which is connected in series to a second signal path for communicating between said second signal terminal and a third signal terminal;

    a third field-effect transistor stage which is connected in series to a third signal path for communicating between said third signal terminal and a fourth signal terminal;

    a fourth field-effect transistor stage which is connected in series to a fourth signal path for communicating between said fourth signal terminal and said first signal terminal;

    a fifth field-effect transistor stage which is connected between said first signal terminal and a reference electric potential;

    a sixth field-effect transistor stage which is connected between said third signal terminal and said reference electric potential;

    a first control line for impressing a first control voltage to the control terminal of said first and third field-effect transistor stages;

    a second control line for impressing the complementary control voltage of said first control voltage to the control terminal of said second and fourth field-effect transistor stages;

    a third control line for impressing a second control voltage to the control terminal of said fifth field-effect transistor stage; and

    a fourth control line for impressing the complementary control voltage of said second control voltage to the control terminal of said sixth field-effect transistor stage.

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