JPS54122959A - Amplitude modulator - Google Patents

Amplitude modulator

Info

Publication number
JPS54122959A
JPS54122959A JP3078778A JP3078778A JPS54122959A JP S54122959 A JPS54122959 A JP S54122959A JP 3078778 A JP3078778 A JP 3078778A JP 3078778 A JP3078778 A JP 3078778A JP S54122959 A JPS54122959 A JP S54122959A
Authority
JP
Japan
Prior art keywords
modulators
constant current
modulation
double balanced
carrier
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
JP3078778A
Other languages
Japanese (ja)
Inventor
Keiji Ito
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 JP3078778A priority Critical patent/JPS54122959A/en
Publication of JPS54122959A publication Critical patent/JPS54122959A/en
Pending legal-status Critical Current

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  • Amplitude Modulation (AREA)

Abstract

PURPOSE: To perform 100% modulation with no adjustment and to avoid to exceed 100%, by applying the same bias voltage to the double balanced modulator and the balanced differential amplifier or the constant current circuit of the double balanced differential amplifier.
CONSTITUTION: The input terminals 2, 2 of the differential transistors TR26, 27, carrier input terminal of the double balanced modulators 4 to 7, output terminals 3, 3, are commonly connected, the emitter common junction point of the transistors TR26, 27 are connected to the collector of the constant current TR 32, and the base of TR32 is connected to the base of the constant current source TR10, 11 of the modulators 4 to 7. When the carrier output level is changed by shifting the bias voltage of TR10, 11, or the modulation degree is changed by shifting the gain of the modulators, the output current of the modulators and the carrier output current of the differential amplifiers 26 to 27 are limited with the constant current circuit, and since the current is equal, 100% modulation is possible with no adjustment and it can not exceed 100%.
COPYRIGHT: (C)1979,JPO&Japio
JP3078778A 1978-03-16 1978-03-16 Amplitude modulator Pending JPS54122959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3078778A JPS54122959A (en) 1978-03-16 1978-03-16 Amplitude modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3078778A JPS54122959A (en) 1978-03-16 1978-03-16 Amplitude modulator

Publications (1)

Publication Number Publication Date
JPS54122959A true JPS54122959A (en) 1979-09-22

Family

ID=12313373

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3078778A Pending JPS54122959A (en) 1978-03-16 1978-03-16 Amplitude modulator

Country Status (1)

Country Link
JP (1) JPS54122959A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5660308U (en) * 1979-10-16 1981-05-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5660308U (en) * 1979-10-16 1981-05-22

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