JPS551772A - Receiver for television signal - Google Patents
Receiver for television signalInfo
- Publication number
- JPS551772A JPS551772A JP7507878A JP7507878A JPS551772A JP S551772 A JPS551772 A JP S551772A JP 7507878 A JP7507878 A JP 7507878A JP 7507878 A JP7507878 A JP 7507878A JP S551772 A JPS551772 A JP S551772A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- input level
- circuit
- bpf
- center frequency
- 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.)
- Granted
Links
Landscapes
- Details Of Television Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
PURPOSE: To enable to obtain optimum reception picture, by changing the center frequency of FM transmission BPF depending on the input level.
CONSTITUTION: The input level of the television FM wave converted with the second frequency converter 12(taking the frequency as Fo) is detected with the AGC circuit 14 having the input signal level detector, and the output is fed to the voltage correction circuit 17. Further, the output of the circuit 17 is fed to the local oscillator 19 of which oscillating frequency is varied with the applied voltage of the second frequency modulator 12, or to the FM transmission BPF 13 in which the transmission center frequency Fo is changed with the applied voltage. Thus, the circuit 17 is operated so that the center frequency FBO of BPF is located at the region of the hatched parts i with the input level. The lateral axis ΔFBO=FO-FBO. Accordingly, best video quality can always be obtained depending on the input level and greater effect can be made at low input level especially.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7507878A JPS551772A (en) | 1978-06-20 | 1978-06-20 | Receiver for television signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7507878A JPS551772A (en) | 1978-06-20 | 1978-06-20 | Receiver for television signal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS551772A true JPS551772A (en) | 1980-01-08 |
JPS6155834B2 JPS6155834B2 (en) | 1986-11-29 |
Family
ID=13565781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7507878A Granted JPS551772A (en) | 1978-06-20 | 1978-06-20 | Receiver for television signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS551772A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57115774U (en) * | 1981-01-08 | 1982-07-17 | ||
JPS57135582A (en) * | 1981-02-16 | 1982-08-21 | Hitachi Ltd | Reception circuit for fm television signal |
JPS57135581A (en) * | 1981-02-16 | 1982-08-21 | Hitachi Ltd | Reception circuit for fm television signal |
JPS61257093A (en) * | 1985-05-10 | 1986-11-14 | Matsushita Electric Ind Co Ltd | Automatic frequency control circuit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5081214A (en) * | 1973-11-17 | 1975-07-01 | ||
JPS5121414A (en) * | 1974-08-16 | 1976-02-20 | Hitachi Ltd | Tachanerushingono jushinsochi |
-
1978
- 1978-06-20 JP JP7507878A patent/JPS551772A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5081214A (en) * | 1973-11-17 | 1975-07-01 | ||
JPS5121414A (en) * | 1974-08-16 | 1976-02-20 | Hitachi Ltd | Tachanerushingono jushinsochi |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57115774U (en) * | 1981-01-08 | 1982-07-17 | ||
JPS6349008Y2 (en) * | 1981-01-08 | 1988-12-16 | ||
JPS57135582A (en) * | 1981-02-16 | 1982-08-21 | Hitachi Ltd | Reception circuit for fm television signal |
JPS57135581A (en) * | 1981-02-16 | 1982-08-21 | Hitachi Ltd | Reception circuit for fm television signal |
JPS61257093A (en) * | 1985-05-10 | 1986-11-14 | Matsushita Electric Ind Co Ltd | Automatic frequency control circuit |
Also Published As
Publication number | Publication date |
---|---|
JPS6155834B2 (en) | 1986-11-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS551772A (en) | Receiver for television signal | |
JPS5514777A (en) | Tuner | |
JPS56103514A (en) | Filter circuit | |
JPS5514782A (en) | Television picture receiver | |
ES465050A1 (en) | Television receiver having a demodulator circuit for demodulating a television signal modulated on a carrier | |
JPS5768977A (en) | Audio receiving circuit for television | |
JPS5546643A (en) | Down converter | |
JPS5242313A (en) | Frequency convertor | |
JPS5570139A (en) | Tuner for wire broadcasting television | |
JPS5531378A (en) | Color adjusting device | |
JPS5720072A (en) | Television receiver | |
JPS57201378A (en) | Video synchronization detecting device and phase correcting device | |
JPS5253622A (en) | Detuning display unit of tv receiver | |
JPS5566182A (en) | Television picture receiver | |
JPS5642439A (en) | Broad band tuner | |
FI864640A (en) | SCRAMBLINGS- OCH DATATRANSMISSIONSSYSTEM FOER EN TELEVISIONSSIGNAL. | |
JPS57170678A (en) | Sound demodulating system for television receiver | |
JPS5683151A (en) | Optical transmission system | |
JPS5280717A (en) | Phase matching circuit | |
JPS57115034A (en) | Television tuner circuit | |
JPS5460825A (en) | Television picture receiver | |
JPS5516534A (en) | Fm receiver | |
JPS52126128A (en) | Television receiver | |
JPS5560388A (en) | Color television receiver | |
JPS5537057A (en) | Tuner device of television picture receiver |