JPS6434335A - Synthetic notch circuit - Google Patents

Synthetic notch circuit

Info

Publication number
JPS6434335A
JPS6434335A JP62192390A JP19239087A JPS6434335A JP S6434335 A JPS6434335 A JP S6434335A JP 62192390 A JP62192390 A JP 62192390A JP 19239087 A JP19239087 A JP 19239087A JP S6434335 A JPS6434335 A JP S6434335A
Authority
JP
Japan
Prior art keywords
specific frequency
switch
signal
inputted
output
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
JP62192390A
Other languages
Japanese (ja)
Inventor
Yasuto Takeuchi
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.)
GE Healthcare Japan Corp
Original Assignee
Yokogawa Medical Systems Ltd
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 Yokogawa Medical Systems Ltd filed Critical Yokogawa Medical Systems Ltd
Priority to JP62192390A priority Critical patent/JPS6434335A/en
Publication of JPS6434335A publication Critical patent/JPS6434335A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measuring Volume Flow (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

PURPOSE:To output only a signal having specific frequency by simple circuit constitution, by changing over an integrating condenser by rotating a switch at specific frequency and passing the integrated output through a filter means. CONSTITUTION:A receiving signal is inputted to the movable contact 23a of a switch 23 through a coupling condenser 21 and an input resistor 23. The movable contact 23a of the switch 23 is connected to a fixed contact at specific frequency while makes a round and the receiving signal is successively inputted to integrating condensers 24a-24d. The integrated receiving signal is inputted to a band filter 28 from an operational amplifier 25 through an output resistor 27. Only a signal having specific frequency is outputted from said band filter 28.
JP62192390A 1987-07-31 1987-07-31 Synthetic notch circuit Pending JPS6434335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62192390A JPS6434335A (en) 1987-07-31 1987-07-31 Synthetic notch circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62192390A JPS6434335A (en) 1987-07-31 1987-07-31 Synthetic notch circuit

Publications (1)

Publication Number Publication Date
JPS6434335A true JPS6434335A (en) 1989-02-03

Family

ID=16290505

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62192390A Pending JPS6434335A (en) 1987-07-31 1987-07-31 Synthetic notch circuit

Country Status (1)

Country Link
JP (1) JPS6434335A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54126445A (en) * 1978-03-24 1979-10-01 Nec Corp Notch filter
JPS60259248A (en) * 1984-06-04 1985-12-21 株式会社東芝 Ultrasonic doppler apparatus
JPS6137143A (en) * 1984-07-27 1986-02-22 横河メディカルシステム株式会社 Ultrasonic diagnostic apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54126445A (en) * 1978-03-24 1979-10-01 Nec Corp Notch filter
JPS60259248A (en) * 1984-06-04 1985-12-21 株式会社東芝 Ultrasonic doppler apparatus
JPS6137143A (en) * 1984-07-27 1986-02-22 横河メディカルシステム株式会社 Ultrasonic diagnostic apparatus

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