JPS5539408A - High frequency modulator circuit - Google Patents
High frequency modulator circuitInfo
- 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
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
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)
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 |
EP0597534A2 (en) * | 1992-11-13 | 1994-05-18 | Philips Patentverwaltung GmbH | Radio transceiver |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50154019A (en) * | 1974-05-31 | 1975-12-11 |
-
1978
- 1978-09-13 JP JP11168878A patent/JPS5539408A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50154019A (en) * | 1974-05-31 | 1975-12-11 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5963893A (en) * | 1982-10-04 | 1984-04-11 | Sanyo Electric Co Ltd | Modulating circuit |
JPS6349434B2 (en) * | 1982-10-04 | 1988-10-04 | Sanyo Electric Co | |
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 | ||
JPH0427258Y2 (en) * | 1984-11-20 | 1992-06-30 | ||
EP0597534A2 (en) * | 1992-11-13 | 1994-05-18 | Philips Patentverwaltung GmbH | Radio transceiver |
EP0597534A3 (en) * | 1992-11-13 | 1994-12-14 | Philips Patentverwaltung | Radio transceiver. |
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