JPS55118209A - Am modulator - Google Patents

Am modulator

Info

Publication number
JPS55118209A
JPS55118209A JP2527379A JP2527379A JPS55118209A JP S55118209 A JPS55118209 A JP S55118209A JP 2527379 A JP2527379 A JP 2527379A JP 2527379 A JP2527379 A JP 2527379A JP S55118209 A JPS55118209 A JP S55118209A
Authority
JP
Japan
Prior art keywords
voltage
input terminal
bias
changed
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
JP2527379A
Other languages
Japanese (ja)
Inventor
Akira Hamada
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 JP2527379A priority Critical patent/JPS55118209A/en
Publication of JPS55118209A publication Critical patent/JPS55118209A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/08—Amplitude modulation by means of variable impedance element
    • H03C1/14—Amplitude modulation by means of variable impedance element the element being a diode

Landscapes

  • Amplitude Modulation (AREA)

Abstract

PURPOSE:To make easy the variable modulation index, by branching the carrier into two waves different in the phase by 180 deg. and changing the impedance of either one wave of the synthesizing circuit by means of the base band signal in the combination of the circuit synthesizing it. CONSTITUTION:The input signal from the carrier input terminal 10 is divided into two waves opposite in phase at the signal branch circuit 1. Taking the voltage between the branch output terminals A and B as 2Va, the voltage between A and B is the value dividing the voltage with the impedance ratio of the varactor diode 2 and the capacitor 3 and the output voltage Vo is outputted to the carrier input terminal 12. Next, with the DC bias of the varactor diode 2 suitably adjusted, when the base band signal is inputted from the input terminal 11, the impedance ratio is changed resulting in obtaining the AM modulation wave Vo. By changing the DC bias is changed with the bias adjuster 4, the modulation index can easily be changed.
JP2527379A 1979-03-05 1979-03-05 Am modulator Pending JPS55118209A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2527379A JPS55118209A (en) 1979-03-05 1979-03-05 Am modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2527379A JPS55118209A (en) 1979-03-05 1979-03-05 Am modulator

Publications (1)

Publication Number Publication Date
JPS55118209A true JPS55118209A (en) 1980-09-11

Family

ID=12161416

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2527379A Pending JPS55118209A (en) 1979-03-05 1979-03-05 Am modulator

Country Status (1)

Country Link
JP (1) JPS55118209A (en)

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