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JPS5539408A - High frequency modulator circuit - Google Patents

High frequency modulator circuit

Info

Publication number
JPS5539408A
JPS5539408A JP11168878A JP11168878A JPS5539408A JP S5539408 A JPS5539408 A JP S5539408A JP 11168878 A JP11168878 A JP 11168878A JP 11168878 A JP11168878 A JP 11168878A JP S5539408 A JPS5539408 A JP S5539408A
Authority
JP
Japan
Prior art keywords
modulator circuit
high frequency
video
capacitor
base
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
JP11168878A
Other languages
Japanese (ja)
Inventor
Junsuke Kusanagi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11168878A priority Critical patent/JPS5539408A/en
Publication of JPS5539408A publication Critical patent/JPS5539408A/en
Pending legal-status Critical Current

Links

Landscapes

  • Television Signal Processing For Recording (AREA)
  • Amplitude Modulation (AREA)

Abstract

PURPOSE: To obtain a high frequency (RF) modulator circuit, which is used to the VTR, the video game and the like, featuring a high economical performance through the simultaneous modulation of both the video and aural signals by using the differential double balanced modulator circuit.
CONSTITUTION: Transistors (TR)1∼7 constitute a differential double balanced modulator circuit. Fixed bias VB3 and VB4 are applied to the bases of TR5 and 6 to break the balance. And the video signal is applied to the base of TR5 via terminal 13 and capacitor C1; while the aural signal is applied to the base of TR6 via terminal 14 and capacitor C2 respectively. Then the cynchronous peak amplitude and the modulation factor can be changed freely with application of appropriate bias VB3 and VB4.
COPYRIGHT: (C)1980,JPO&Japio
JP11168878A 1978-09-13 1978-09-13 High frequency modulator circuit Pending JPS5539408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11168878A JPS5539408A (en) 1978-09-13 1978-09-13 High frequency modulator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11168878A JPS5539408A (en) 1978-09-13 1978-09-13 High frequency modulator circuit

Publications (1)

Publication Number Publication Date
JPS5539408A true JPS5539408A (en) 1980-03-19

Family

ID=14567644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11168878A Pending JPS5539408A (en) 1978-09-13 1978-09-13 High frequency modulator circuit

Country Status (1)

Country Link
JP (1) JPS5539408A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963893A (en) * 1982-10-04 1984-04-11 Sanyo Electric Co Ltd Modulating circuit
JPS6190365U (en) * 1984-11-20 1986-06-12
US4788590A (en) * 1984-04-17 1988-11-29 Murata Mfg. Co., Ltd. RF converter employing an SAW filter
EP0597534A3 (en) * 1992-11-13 1994-12-14 Philips Patentverwaltung Radio transceiver.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50154019A (en) * 1974-05-31 1975-12-11

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50154019A (en) * 1974-05-31 1975-12-11

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963893A (en) * 1982-10-04 1984-04-11 Sanyo Electric Co Ltd Modulating circuit
US4788590A (en) * 1984-04-17 1988-11-29 Murata Mfg. Co., Ltd. RF converter employing an SAW filter
JPS6190365U (en) * 1984-11-20 1986-06-12
EP0597534A3 (en) * 1992-11-13 1994-12-14 Philips Patentverwaltung Radio transceiver.

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