JPS6412656A - Analog front end circuit - Google Patents

Analog front end circuit

Info

Publication number
JPS6412656A
JPS6412656A JP16801287A JP16801287A JPS6412656A JP S6412656 A JPS6412656 A JP S6412656A JP 16801287 A JP16801287 A JP 16801287A JP 16801287 A JP16801287 A JP 16801287A JP S6412656 A JPS6412656 A JP S6412656A
Authority
JP
Japan
Prior art keywords
changeover switch
apf
bpf
group
converter
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
JP16801287A
Other languages
Japanese (ja)
Inventor
Hisao Otake
Kazunari Yamamoto
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP16801287A priority Critical patent/JPS6412656A/en
Publication of JPS6412656A publication Critical patent/JPS6412656A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To suppress noise and to improve the S/N of a reception signal by switching a changeover switch so as to connect a full band pass filter APF and a band pass filter BPF in cascade in using a group filter as the transmission use and switching the changeover switch in using it as the reception use so as to use only the BPF. CONSTITUTION:One changeover switch 12 is connected to the position of a D/A converter 10 and the other changeover switch 30 is connected to the position of a gain amplifier 31 respectively at the transmission, the one changeover switch 43 in the group filter 40 is connected to the position of a terminal 41 and the other changeover switch 45 is connected to the position of APF 44 respectively to connect the APF 44 and the BPF 46 continuously. At the reception state, the one changeover switch 12 is connected to the position of the A/D converter 11 and the other changeover switch 30 is connected to the position of the gain amplifier 32 respectively, the one changeover switch 43 is connected the position of earth in the group filtr 40 and the other changeover switch 45 is connected to the position of terminal 41 respectively and only the BPF 46 is connected between the terminals 41 and 42. Thus, the noise generated in the APF is suppressed by unconnected of the APF and the S/N in the received sig.
JP16801287A 1987-07-06 1987-07-06 Analog front end circuit Pending JPS6412656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16801287A JPS6412656A (en) 1987-07-06 1987-07-06 Analog front end circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16801287A JPS6412656A (en) 1987-07-06 1987-07-06 Analog front end circuit

Publications (1)

Publication Number Publication Date
JPS6412656A true JPS6412656A (en) 1989-01-17

Family

ID=15860169

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16801287A Pending JPS6412656A (en) 1987-07-06 1987-07-06 Analog front end circuit

Country Status (1)

Country Link
JP (1) JPS6412656A (en)

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