JPS6424626A - Digital control type variable capacitor device - Google Patents

Digital control type variable capacitor device

Info

Publication number
JPS6424626A
JPS6424626A JP18178787A JP18178787A JPS6424626A JP S6424626 A JPS6424626 A JP S6424626A JP 18178787 A JP18178787 A JP 18178787A JP 18178787 A JP18178787 A JP 18178787A JP S6424626 A JPS6424626 A JP S6424626A
Authority
JP
Japan
Prior art keywords
gate
supplied
signal
connecting point
capacitance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP18178787A
Other languages
Japanese (ja)
Inventor
Takehiko Uno
Hiroichi Ishida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Nippon Telegraph and Telephone Corp
Original Assignee
Mitsubishi Electric Corp
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp, Nippon Telegraph and Telephone Corp filed Critical Mitsubishi Electric Corp
Priority to JP18178787A priority Critical patent/JPS6424626A/en
Publication of JPS6424626A publication Critical patent/JPS6424626A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent the fluctuation in capacitance due to leakage of a signal by using a 1st driving circuit and a 2nd driving circuit outputting signals opposite in polarity to each other from a control circuit so as to drive a 1st semiconductor switch and a 2nd semiconductor switch element each having a complementary switching characteristic. CONSTITUTION:A voltage at a cross point between the output R of a NOR circuit 17 and the output S of an inverter 18, through the proper selection of the size of transistors(TRs), and the change from 'L' to 'H' of a signal R supplied to the gate 7 of an N-channel TR 4 of a switching circuit is supplied to a connecting point P through the coupling capacitance and the parasitic capacitance between between the gate 7 and the source 8 and between the gate 7 and the drain 6, and the change from 'H' to 'L' of a signal S supplied to the gate 10 of a P-channel TR 5 is supplied to the connecting point P through a coupling capacitance and a parasitic capacitance, etc., between the gate 10 and the drain 9 and between the gate 10 and the source 11, and they are cancelled together thereby preventing a voltage U at the connecting point P from being affected.
JP18178787A 1987-07-21 1987-07-21 Digital control type variable capacitor device Pending JPS6424626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18178787A JPS6424626A (en) 1987-07-21 1987-07-21 Digital control type variable capacitor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18178787A JPS6424626A (en) 1987-07-21 1987-07-21 Digital control type variable capacitor device

Publications (1)

Publication Number Publication Date
JPS6424626A true JPS6424626A (en) 1989-01-26

Family

ID=16106865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18178787A Pending JPS6424626A (en) 1987-07-21 1987-07-21 Digital control type variable capacitor device

Country Status (1)

Country Link
JP (1) JPS6424626A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6471323A (en) * 1987-09-11 1989-03-16 Fujitsu Ltd Analog switching circuit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5740969A (en) * 1980-08-25 1982-03-06 Toshiba Corp Complementary mos inverter
JPS5899033A (en) * 1981-12-09 1983-06-13 Nec Corp Integrated circuit device
JPS58186224A (en) * 1982-04-24 1983-10-31 Toshiba Corp Cmos analog switch
JPS60160651A (en) * 1984-01-31 1985-08-22 Hitachi Ltd Semiconductor device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5740969A (en) * 1980-08-25 1982-03-06 Toshiba Corp Complementary mos inverter
JPS5899033A (en) * 1981-12-09 1983-06-13 Nec Corp Integrated circuit device
JPS58186224A (en) * 1982-04-24 1983-10-31 Toshiba Corp Cmos analog switch
JPS60160651A (en) * 1984-01-31 1985-08-22 Hitachi Ltd Semiconductor device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6471323A (en) * 1987-09-11 1989-03-16 Fujitsu Ltd Analog switching circuit

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