JPS57103419A - Notch rejecting filter - Google Patents

Notch rejecting filter

Info

Publication number
JPS57103419A
JPS57103419A JP55179350A JP17935080A JPS57103419A JP S57103419 A JPS57103419 A JP S57103419A JP 55179350 A JP55179350 A JP 55179350A JP 17935080 A JP17935080 A JP 17935080A JP S57103419 A JPS57103419 A JP S57103419A
Authority
JP
Japan
Prior art keywords
frequency
circuit
filter
input signal
power source
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
JP55179350A
Other languages
Japanese (ja)
Inventor
Tatsuji Matsuno
Yoshio Nomura
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.)
TOUYOU TSUUSHINKI KK
Toyo Communication Equipment Co Ltd
Original Assignee
TOUYOU TSUUSHINKI KK
Toyo Communication Equipment Co 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 TOUYOU TSUUSHINKI KK, Toyo Communication Equipment Co Ltd filed Critical TOUYOU TSUUSHINKI KK
Priority to JP55179350A priority Critical patent/JPS57103419A/en
Publication of JPS57103419A publication Critical patent/JPS57103419A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H19/00—Networks using time-varying elements, e.g. N-path filters
    • H03H19/002—N-path filters

Abstract

PURPOSE:To reject easily and surely frequency components of an input signal, by operating the difference between the output of a digital filter and the input signal by a subtracting circuit. CONSTITUTION:An input signal is applied to the input of a digital filter 15. The digital filter 15 has the selective characteristics of a center frequency f0. Since the phase is not shifted in this filter 15, the difference between the output of this filter 15 and the input signal is operated by a subtracting circuit 26 to reject easily and surely components of the frequency f0. Meanwhile, the voltage of a commercial frequency f<0> obtained in the secondary side of a trnasistor T is applied to a clock generating circuit as it is. The circuit 23 consists of a phase synchronizing circuit having the frequency multiplying function, and the clock signal of a frequency nf0 which has the phase synchronized with the power source frequency f0 is obtained as the output of the circuit 23. By this constitution, the center frequency of the filter 15 has the phase synchronized with the power source frequency f0 correctly; and when the power source frequency f0 is fluctuated, the center frequency is fluctuated while following this fluctuation completely.
JP55179350A 1980-12-17 1980-12-17 Notch rejecting filter Pending JPS57103419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55179350A JPS57103419A (en) 1980-12-17 1980-12-17 Notch rejecting filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55179350A JPS57103419A (en) 1980-12-17 1980-12-17 Notch rejecting filter

Publications (1)

Publication Number Publication Date
JPS57103419A true JPS57103419A (en) 1982-06-28

Family

ID=16064301

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55179350A Pending JPS57103419A (en) 1980-12-17 1980-12-17 Notch rejecting filter

Country Status (1)

Country Link
JP (1) JPS57103419A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62278852A (en) * 1986-05-28 1987-12-03 Sharp Corp Phase synchronizing filter
GB2500067A (en) * 2012-03-09 2013-09-11 Renesas Mobile Corp An N-path filter for notching out unwanted signals in wireless receivers

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4722652A (en) * 1971-02-26 1972-10-09 Siemens Ag
JPS4960850A (en) * 1972-09-25 1974-06-13

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4722652A (en) * 1971-02-26 1972-10-09 Siemens Ag
JPS4960850A (en) * 1972-09-25 1974-06-13

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62278852A (en) * 1986-05-28 1987-12-03 Sharp Corp Phase synchronizing filter
GB2500067A (en) * 2012-03-09 2013-09-11 Renesas Mobile Corp An N-path filter for notching out unwanted signals in wireless receivers

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