CN1120624C - Electronic tuner with antenna amplifier - Google Patents
Electronic tuner with antenna amplifier Download PDFInfo
- Publication number
- CN1120624C CN1120624C CN 99101159 CN99101159A CN1120624C CN 1120624 C CN1120624 C CN 1120624C CN 99101159 CN99101159 CN 99101159 CN 99101159 A CN99101159 A CN 99101159A CN 1120624 C CN1120624 C CN 1120624C
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- input
- circuit
- noise amplifier
- low noise
- diode
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Abstract
The present invention relates to an electronic tuner with an antenna amplifier. A low-noise amplifier 1 and a corresponding control switch 2 are connected between the input end of an antenna signal and an MF wave trap 3, wherein the low-noise amplifier 1 is mainly composed of a dual-transmitting triode T1 and a peripheral electronic device; the control switch 2 is mainly composed of triodes T2, T3 and T4, diodes V1, V2, V3, V4, V5 and V6 and peripheral electronic devices. The power gain of the present invention is increased by 15dB, and the noise coefficient of the present invention is reduced by 6dB. The present invention has a very strong receiving function to meet watching requirements under various conditions.
Description
The present invention relates to a kind of tuner (being commonly called as tuner) of television receiver, specifically relate to a kind of electronic tuning unit with antenna amplifier antennafire.
At present, band IC interior bus (I
2C) each big TV factory generally produces Kong Zhi digital to television machine in the whole nation, and the international standard type belt switch conversion tuner that cooperates the IC interior bus to use is also progressively adopted.This tuner generally all is to put back to road, conversion switch, frequency mixer and oscillation circuit etc. by intermediate frequency trap circuit, input circuit, height to constitute, and its intermediate frequency trap circuit links to each other with the aerial signal input, and medium frequency output end links to each other with frequency mixer.The anti-interference index of this tuner is better, but when remote countryside used, the sensitivity that open circuit signaling receives was lower, can not be satisfied with and watch.
Because China's cable TV does not spread to the rural area as yet at present, vast rural area can only receive the OCTV signal, in remote districts, particularly a little less than the mountain area OCTV pickup electrode, 80% signal is (normally the standard of watching is answered more than the 60dB μ v) below the 30dB μ v, thereby uses existing common tuner far not reach and watch requirement.
The present invention is the problem a little less than solution rural area and the TV signal from far-off regions, and a kind of power gain height is provided, and noise factor is low, can improve the electronic tuning unit of the band antenna amplifier antennafire of watching effect greatly.
For achieving the above object, the invention provides a kind of electronic tuning unit with antenna amplifier antennafire, this electronic tuning unit comprises that intermediate frequency trap circuit 3, input circuit 4, height put back to road 5, conversion switch 6, frequency mixer 7 and oscillation circuit 8, it is characterized in that inserting a low noise amplifier 1 and a control corresponding switch 2 between the aerial signal input of tuner and intermediate frequency trap circuit 3.
Described low noise amplifier 1 is the broadband low noise amplifier, mainly constitute by two emission triode T1 and peripheral electron device thereof, its input links to each other with the aerial signal input of tuner through diode V1, and output links to each other with intermediate frequency trap circuit 3 through diode V2.
The peripheral electron device of above-mentioned two emission triode T1 comprises resistance R 8, R9, R10, R11, R12, capacitor C 5, C6, C7, C8, C9 and inductance L 3, L5.
Described control switch 2 is mainly by triode T2, T3, T4, diode V1, V2, V3, V4, V5, V6 and peripheral electron device thereof constitute, the output of its input termination low noise amplifier 1, its output connects the input of intermediate frequency trap circuit 3 through diode V5, V6.
The peripheral electron device of described control switch comprises resistance R 1, R2, R3, R4, R5, R6, R7, R13, R14, capacitor C 3, C4, inductance L 4.
Because tuner of the present invention has built-in low noise amplifier and control corresponding switch, and by microcontroller (MCU) control of television set, (for example in the city) breaking inner antenna amplifier antennafire when signal is strong; (for example in the rural area or city when receiving weak signal TV station) connected inner low noise amplifier when signal was weak, and therefore city dweller who no matter is situated on a bustling street or remote rural citizen can both obtain same satisfied TV watching effect.Compare with existing tuner, the power gain of tuner of the present invention has improved 15dB, and noise factor has reduced 6dB, makes it have superpower receiving function, thereby can satisfy the requirement of watching under various conditions.
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is low noise amplifier of the present invention and control switch part electrical schematic diagram.
Fig. 1 has provided total circuit block diagram of the present invention, and it is identical with the circuit of at present general international standard type belt switch conversion tuner that the intermediate frequency trap circuit 3 among the figure, input circuit 4, height are put back to road 5, conversion switch 6, frequency mixer 7 and oscillation circuit 8.Wherein input circuit 4 comprises hyperfrequency input circuit, very high frequency(VHF) (height) input circuit and very high frequency(VHF) (low) input circuit; Height is put back to road 5 and is comprised that the hyperfrequency height is put back to the road, very high frequency(VHF) (height) height puts back to the road and very high frequency(VHF) (low) height is put back to the road; Oscillation circuit 8 comprises hyperfrequency oscillation circuit, very high frequency(VHF) (height) oscillation circuit and very high frequency(VHF) (low) oscillation circuit.Its intermediate frequency trap circuit 3 links to each other with the aerial signal input, and medium frequency output end links to each other with frequency mixer 7.For make this tuner in the rural area or remote districts also can obtain the satisfied effect of watching when using, the present invention is a low noise amplifier 1 of access and a control corresponding switch 2 between the aerial signal input of existing tuner and intermediate frequency trap circuit 3.Above-mentioned low noise amplifier 1 and control switch 2 circuit are as shown in Figure 2, wherein low noise amplifier 1 is the broadband low noise amplifier, mainly by two emission triode T1 and peripheral electron device resistance R8 thereof, R9, R10, R11, R12, capacitor C 5, C6, C7, C8, C9 and inductance L 3, L5 constitute, amplifier input terminal links to each other with the aerial signal input of tuner through diode V1, and output links to each other with intermediate frequency trap circuit 3 through diode V2.The fundamental characteristics of this amplifier is mainly by two emission triode T
1Guarantee that other element then guarantees the operate as normal of amplifier.Control switch 2 is mainly by triode T2, T3, T4, diode V1, V2, V3, V4, V5, V6 and peripheral electron device resistance R1 thereof, R2, R3, R4, R5, R6, R7, R13, R14, and capacitor C 3, C4, inductance L 4 constitutes.The output of its input termination low noise amplifier 1, its output connects the input of intermediate frequency trap circuit 3 through diode V5, V6.The switching circuit that is made of triode etc. is equivalent to hand, and the circuit that is made of diode etc. is equivalent to door, and hand is subjected to commander's (the microcontroller MCU of television set is equivalent to brain) of brain, opens or shuts corresponding door and provide different paths for signal.
Operation principle of the present invention as shown in Figure 2, when low noise amplifier is 0V, triode T
2T
4End T
3Conducting, T
3The output high level, diode V
3V
4V
5V
6Conducting, triode T
4Output low level, two emission this moment triode T
1Do not work, signal directly enters input circuit, and the tuner of this moment just is equivalent to common tuner.
When low noise amplifier is 5V, triode T
2T
4Conducting, T
3End T
3Output low level, diode V
3V
4V
5V
6End T
4The output high level, two emission this moment triode T
1Work, weak signal is passed through T
1Carry out low noise and amplify, enter input circuit.
Because the amplifier effect of low noise amplifier makes the power gain of whole tuner bring up to 45dB from the 30dB of VHF band and hyper band respectively.Noise factor then drops to 4dB and drops to 5dB from the 11dB of hyper band from the 10dB of VHF band.
Claims (4)
1, a kind of electronic tuning unit of band antenna amplifier antennafire of TV receiver, comprise intermediate frequency trap circuit (3), input circuit (4), height is put back to road (5), conversion switch (6), frequency mixer (7) and oscillation circuit (8), it is characterized in that between the aerial signal input of tuner and intermediate frequency trap circuit (3), inserting a low noise amplifier (1) and a control corresponding switch (2), described low noise amplifier (1) is the broadband low noise amplifier, mainly constitute by two emission triodes (TI) and peripheral electron device thereof, its input links to each other with the aerial signal input of tuner through diode (V1), and output links to each other with intermediate frequency trap circuit (3) through diode (V2).
2, the electronic tuning unit of band antenna amplifier antennafire according to claim 1, the peripheral electron device that it is characterized in that two emission triodes (TI) comprises resistance (R8), (R9), (R10), (R11), (R12), electric capacity (C5), (C6), (C7), (C8), (C9) and inductance (L3), (L5).
3, the electronic tuning unit of band antenna amplifier antennafire according to claim 1, it is characterized in that described control switch (2) is mainly by triode (T2), (T3), (T4), diode (V1), (V2), (V3), (V4), (V5), (V6) and peripheral electron device thereof constitute, the output of its input termination low noise amplifier (1), its output connects the input of intermediate frequency trap circuit (3) through diode (V5), (V6).
4, the electronic tuning unit of band antenna amplifier antennafire according to claim 3, the peripheral electron device that it is characterized in that described control switch comprises resistance (R1), (R2), (R3), (R4), (R5), (R6), (R7), (R13), (R14), electric capacity (C3), (C4), inductance (L4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99101159 CN1120624C (en) | 1999-01-16 | 1999-01-16 | Electronic tuner with antenna amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99101159 CN1120624C (en) | 1999-01-16 | 1999-01-16 | Electronic tuner with antenna amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1247435A CN1247435A (en) | 2000-03-15 |
| CN1120624C true CN1120624C (en) | 2003-09-03 |
Family
ID=5270320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99101159 Expired - Fee Related CN1120624C (en) | 1999-01-16 | 1999-01-16 | Electronic tuner with antenna amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1120624C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010055707B4 (en) * | 2009-12-29 | 2015-11-12 | Silicon Laboratories Inc. | Configurable transceiver input, configuring a tuner circuit and system with configurable transceiver input |
-
1999
- 1999-01-16 CN CN 99101159 patent/CN1120624C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1247435A (en) | 2000-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Huizhou TCL King High Frequence El. Co.,Ltd. Assignor: TCL Kingbrand Electronic (Shenzhen) Co., Ltd. Contract fulfillment period: 2005.1.1 to 2012.12.31 contract change Contract record no.: 2009440000424 Denomination of invention: Electronic tuner with antenna amplifier Granted publication date: 20030903 License type: Exclusive license Record date: 2009.5.27 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2005.1.1 TO 2012.12.31; CHANGE OF CONTRACT Name of requester: HUIZHOU TCL WANG BRAND HIGH FREQUENCY ELECTRONICS Effective date: 20090527 |
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| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN TCL NEW TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: TCL KING ELECTRICAL APPLIANCES (SHENZHEN) CO., LTD. Effective date: 20110212 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 518067 NO.5, MIDDLE OF GONGYE AVENUE, SHEKOU, SHENZHEN CITY, GUANGDONG PROVINCE TO: 518067 TCL BUILDING, SOUTH OF NANHAI AVENUE, NANSHAN DISTRICT, SHENZHEN CITY |
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| TR01 | Transfer of patent right |
Effective date of registration: 20110212 Address after: 518067 South TCL building, Nanhai Road, Shenzhen, Nanshan District Patentee after: Shenzhen TCL New Technology Co., Ltd. Address before: 518067 No. 5, industrial road, Shekou, Guangdong, Shenzhen Patentee before: TCL Kingbrand Electronic (Shenzhen) Co., Ltd. |
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| EM01 | Change of recordation of patent licensing contract |
Change date: 20110426 Contract record no.: 2009440000424 Assignor after: Shenzhen TCL New Technology Co., Ltd. Assignor before: TCL Kingbrand Electronic (Shenzhen) Co., Ltd. |
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| DD01 | Delivery of document by public notice |
Addressee: Shenzhen TCL New Technology Co., Ltd. Document name: Notification to Pay the Fees |
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| DD01 | Delivery of document by public notice |
Addressee: Shenzhen TCL New Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030903 Termination date: 20130116 |