JPS52123847A - Expander of intermediate frequency band - Google Patents

Expander of intermediate frequency band

Info

Publication number
JPS52123847A
JPS52123847A JP4073776A JP4073776A JPS52123847A JP S52123847 A JPS52123847 A JP S52123847A JP 4073776 A JP4073776 A JP 4073776A JP 4073776 A JP4073776 A JP 4073776A JP S52123847 A JPS52123847 A JP S52123847A
Authority
JP
Japan
Prior art keywords
frequency band
intermediate frequency
expander
circuit
detection circuit
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
JP4073776A
Other languages
Japanese (ja)
Inventor
Motoyasu Tanaka
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4073776A priority Critical patent/JPS52123847A/en
Publication of JPS52123847A publication Critical patent/JPS52123847A/en
Pending legal-status Critical Current

Links

Landscapes

  • Radio Transmission System (AREA)
  • Attenuators (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

PURPOSE: To obtain the circuit with the required expansion rate easily by composing the intermediate frequency band expander, used for the diversity receiption, of the variable attenuating circuit that relative by permit ease of a presumption of the attenaution control characteristic and the detection circuit that contains an envelope detection circuit.
COPYRIGHT: (C)1977,JPO&Japio
JP4073776A 1976-04-10 1976-04-10 Expander of intermediate frequency band Pending JPS52123847A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4073776A JPS52123847A (en) 1976-04-10 1976-04-10 Expander of intermediate frequency band

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4073776A JPS52123847A (en) 1976-04-10 1976-04-10 Expander of intermediate frequency band

Publications (1)

Publication Number Publication Date
JPS52123847A true JPS52123847A (en) 1977-10-18

Family

ID=12588933

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4073776A Pending JPS52123847A (en) 1976-04-10 1976-04-10 Expander of intermediate frequency band

Country Status (1)

Country Link
JP (1) JPS52123847A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6218125A (en) * 1985-07-17 1987-01-27 Nippon Telegr & Teleph Corp <Ntt> Diversity synthesis circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6218125A (en) * 1985-07-17 1987-01-27 Nippon Telegr & Teleph Corp <Ntt> Diversity synthesis circuit

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