WO2009005241A1 - Tuner - Google Patents
Tuner Download PDFInfo
- Publication number
- WO2009005241A1 WO2009005241A1 PCT/KR2008/003616 KR2008003616W WO2009005241A1 WO 2009005241 A1 WO2009005241 A1 WO 2009005241A1 KR 2008003616 W KR2008003616 W KR 2008003616W WO 2009005241 A1 WO2009005241 A1 WO 2009005241A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- band
- signal
- signals
- vhf
- frequency
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
- H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
- H03J5/242—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection
- H03J5/244—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection used exclusively for band selection using electronic means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
- H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
Definitions
- Embodiments relate to a tuner.
- a tuner is a device which selects and receives a desired broadcasting channel from a high frequency signal received by an antenna.
- the tuner can have a very high frequency (VHF) band ranging from several ten MHz to several hundreds MHz and an ultra high frequency (UHF) band ranging from several hundreds MHz to several ten GHz.
- VHF very high frequency
- UHF ultra high frequency
- the tuner is divided into a VHF tuning unit receiving a VHF band channel and an
- UHF tuning unit receiving an UHF band channel.
- the channel received from the VHF tuning unit is divided into a VHF-L band channel and a VHF-H band channel.
- Embodiments provide a tuner that can reduce generation of interference between signals and improve channel selection.
- a tuner comprises: a level attenuator attenuating a signal of a band lower than a first band; a first input tuning unit receiving a signal outputted from the level attenuator to tune a signal of the first band; and a second input tuning unit receiving and tuning a signal of a second band lower than the first band.
- a tuner comprises: a high pass filter receiving signals of a plurality of bands and passing signals of a predetermined band or more; an intermediate frequency trap unit receiving the signals outputted from the high pass filter and removing intermediate frequency signals; a level attenuator attenuating signals of a band lower than a first band among signals outputted from the intermediate frequency trap unit; a first input tuning unit receiving signals outputted from the level attenuator to tune signals of the first band; and a second input tuning unit receiving and tuning signals of a second band among the signals outputted from the intermediate frequency trap unit.
- a tuner according to an embodiment can reduce generation of interference between signals and improve channel selection.
- Fig. 1 is a view of a tuner according to an embodiment.
- Fig. 2 is a waveform graph of frequency signals outputted from a VHF-H input tuning unit of Fig. 1.
- FIGs. 3 and 4 are views illustrating channel selection characteristics of a tuner according to an embodiment. Mode for the Invention
- Fig. 1 is a view of a tuner according to an embodiment
- Fig. 2 is a waveform graph of frequency signals outputted from a VHF-H input tuning unit of Fig. 1.
- a high pass filter (HPF) 11 filters signals received from an antenna ANT to output a high frequency signal.
- the signal outputted from the high pass filter 11 may be a signal of a band ranging from about 40 MHz to about 950 MHz received from the antenna ANT.
- An intermediate frequency trap unit 13 removes an intermediate frequency signal from the high frequency signal filtered through the high pass filter 11.
- the intermediate frequency trap unit 13 may comprise an inductor and a capacitor.
- an inductor L21 and a capacitor C21 may be parallel-connected to one another.
- An UHF input tuning unit 15 receives and tunes an UHF band frequency signal from the high frequency signal in which the intermediate frequency signal is removed through the intermediate frequency trap unit 13. For example, a switching diode D21 turns on by an UHF selection switch (UHF-SW) signal, and the UHF input tuning unit 15 receives and tunes the UHF band signal. For example, the UHF input tuning unit 15 may tune an UHF band signal ranging from about 470 MHz to about 850 MHz.
- a VHF-H input tuning unit 19 receives and tunes an VHF-H band signal from the high frequency signal in which the intermediate frequency signal is removed through the intermediate frequency trap unit 13. For example, a switching diode D turns on by an VHF-H selection switch (VHF-H SW) signal, and thus, the VHF-H input tuning unit 19 tunes a VHF-H band signal ranging from about 170 MHz to about 470 MHz received through a level attenuator 17, inductors L22 and L23, and a varactor diode D22.
- VHF-H SW VHF-H selection switch
- the level attenuator 17 may reduces a signal level of a low frequency band in the
- the level attenuator 17 may reduce a signal level of a band ranging from about 50 MHz to about 170 MHz.
- the level attenuator 17 may comprise a capacitor and an inductor.
- the high pass filter comprising a capacitor C and an inductor L may serve as the level attenuator 17 to pass only a high frequency band signal having a predetermined band range.
- the capacitor C may be connected between the intermediate frequency trap unit 13 and the VHF-H input tuning unit 19.
- the inductor L has one end connected between the capacitor C and the VHF-H input tuning unit 19 and the other end which is grounded.
- a VHF-L input tuning unit 21 receives and tunes an VHF-L band signal from the high frequency signal in which the intermediate frequency signal is removed through the intermediate frequency trap unit 13.
- the VHF-L input tuning unit 21 tunes a VHF-L band signal ranging from about 50 MHz to about 170 MHz received through inductors L24 and L25 and a varactor diode D23.
- the tuner removes a low frequency band signal from signals received through the antenna ANT using the high pass filter 11.
- the tuner transmits the signal in which the intermediate frequency signal is removed through the intermediate frequency trap unit 13 to the UHF input tuning unit 15, the VHF-H input tuning unit 19, and the VHF-L input tuning unit 21.
- the UHF input tuning unit 15, the VHF-H input tuning unit 19, and the VHF-L input tuning unit 21 tune the received high frequency signal to select a channel of a desired frequency band.
- the diode D is electrically connected by a voltage supplied from the VHF-H selection switch (VHF-H SW).
- VHF-H SW VHF-H selection switch
- the high frequency signal outputted from the high pass filter 11 and the intermediate frequency trap unit 13 passes through the level attenuator 17 and is transmitted to the VHF-H input tuning unit 19.
- the high pass filter comprising a capacitor C and an inductor L may serve as the level attenuator 17.
- the level attenuator 17 attenuates a signal level of a frequency of a predetermined VHF-H band or less and passes a frequency signal of a predetermined VHF-H band or more.
- the level attenuator 17 remarkably reduces the signal level of a frequency band ranging from about 50 MHz to about 170 MHz in the selected VHF-H band when the VHF-H band channel is selected.
- the VHF-H band channel is selected by the VHF-H input tuning unit 19
- interference generated by a signal of the band ranging from about 50 MHz to about 170 MHz may significantly reduced.
- Fig. 2 is detected in case where the level attenuator 17 is not applied. That is, in case where the level attenuator 17 is not applied, a signal level of the band ranging from about 50 MHz to about 170 MHz is greater than that detected in case where the level attenuator 17 is applied.
- a channel frequency Fl and a channel frequency F2 are received within a VHF-L band (from about 50 MHz to about 170 MHz), and a channel frequency F3 is received within a VHF-H band (from about 170 MHz to about 470 MHz). Then, an interference signal frequency F4 generated from the sum of the channel frequency Fl and the channel frequency F2 is located around the channel frequency F3.
- Fig. 3 is a view of signal interference when a level attenuator is not applied
- Fig. 4 is a view of signal interference when a level attenuator is applied.
- a signal level of the channel frequency Fl and a signal level of the channel frequency F2 are varied according to application of the level attenuator 17.
- the level attenuator 17 When the level attenuator 17 is applied, the signal level of the channel frequency Fl and the signal level of the channel frequency F2 are reduced, and a signal level of the interference signal frequency F4 is further reduced.
- the interference signal frequency F4 Since the signal level of the interference signal frequency F4 is large when the level attenuator 17 is not applied, the interference signal frequency F4 has an effect on the channel selection of the channel frequency F3. However, the signal level of the interference signal frequency F4 is very small when the level attenuator 17 is applied, it may be prevented that the interference signal frequency F4 has an effect on the channel selection of the channel frequency F3.
- the channel frequency Fl may be 55.25 MHz
- the channel frequency F2 may be 157.25 MHz
- the channel frequency F3 may be 210.25 MHz
- the interference signal frequency F4 generated from the sum of the channel frequency Fl and the channel frequency F2 may be 212.5 MHz.
- the VHF-H input tuning unit 19 can tune to a signal equal to the signal in which is illustrated by character B of Fig. 2 to select the 210.25 MHz channel. Therefore, since a signal of the 55.25 MHz and a signal of the 157.25 MHz are attenuated and received, the interference signal of the 212.5 MHz can be reduced. According to an embodiment, the signal level of the interference signal can be reduced, thereby improving the selection of the 210.25 MHz channel.
- example embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment is comprised in at least one embodiment of the invention.
- the appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.
- the tuner according to the embodiments can reduce generation of interference between signals and improve channel selection.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Noise Elimination (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200880102472A CN101779450A (en) | 2007-07-05 | 2008-06-25 | Tuner |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2007-0067501 | 2007-07-05 | ||
KR1020070067501A KR20090003013A (en) | 2007-07-05 | 2007-07-05 | Input resonance circuit of tuner |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009005241A1 true WO2009005241A1 (en) | 2009-01-08 |
Family
ID=40226236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2008/003616 WO2009005241A1 (en) | 2007-07-05 | 2008-06-25 | Tuner |
Country Status (4)
Country | Link |
---|---|
KR (1) | KR20090003013A (en) |
CN (1) | CN101779450A (en) |
TW (1) | TW200908726A (en) |
WO (1) | WO2009005241A1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10340045B2 (en) | 2014-10-21 | 2019-07-02 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for autoimmune system conditions |
US10347368B2 (en) | 2014-10-21 | 2019-07-09 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics, and therapeutics for cardiovascular disease conditions |
US10347379B2 (en) | 2014-10-21 | 2019-07-09 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics and therapeutics for cutaneous conditions |
US10346589B2 (en) | 2014-10-21 | 2019-07-09 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics |
US10347362B2 (en) | 2014-10-21 | 2019-07-09 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for endocrine system conditions |
US10360347B2 (en) | 2014-10-21 | 2019-07-23 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for neurological health issues |
US10358682B2 (en) | 2014-10-21 | 2019-07-23 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for conditions associated with microbiome functional features |
US10366793B2 (en) | 2014-10-21 | 2019-07-30 | uBiome, Inc. | Method and system for characterizing microorganism-related conditions |
US10381112B2 (en) | 2014-10-21 | 2019-08-13 | uBiome, Inc. | Method and system for characterizing allergy-related conditions associated with microorganisms |
US10388407B2 (en) | 2014-10-21 | 2019-08-20 | uBiome, Inc. | Method and system for characterizing a headache-related condition |
US10383519B2 (en) | 2014-10-21 | 2019-08-20 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics and therapeutics for conditions associated with functional features |
US10786194B2 (en) | 2014-10-21 | 2020-09-29 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for conditions associated with microbiome taxonomic features |
US10790060B2 (en) | 2014-10-21 | 2020-09-29 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for mental health associated conditions |
US10789334B2 (en) | 2014-10-21 | 2020-09-29 | Psomagen, Inc. | Method and system for microbial pharmacogenomics |
US10795972B2 (en) | 2014-10-21 | 2020-10-06 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for locomotor system conditions |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020075414A1 (en) * | 2000-12-14 | 2002-06-20 | Alps Electric Co., Ltd. | Television tuner having less distortion |
US6573949B1 (en) * | 1999-04-20 | 2003-06-03 | Alps Electric Co., Ltd. | Television signal receiving tuner with frequency-modulation broadcast-band attenuation circuit |
US6580468B1 (en) * | 1999-03-18 | 2003-06-17 | Masaki Yamamoto | Television tuner with suppressed attenuation of level of video intermediate frequency with respect to rise in ambient temperature |
-
2007
- 2007-07-05 KR KR1020070067501A patent/KR20090003013A/en not_active Application Discontinuation
-
2008
- 2008-06-25 CN CN200880102472A patent/CN101779450A/en active Pending
- 2008-06-25 WO PCT/KR2008/003616 patent/WO2009005241A1/en active Application Filing
- 2008-07-04 TW TW097125283A patent/TW200908726A/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6580468B1 (en) * | 1999-03-18 | 2003-06-17 | Masaki Yamamoto | Television tuner with suppressed attenuation of level of video intermediate frequency with respect to rise in ambient temperature |
US6573949B1 (en) * | 1999-04-20 | 2003-06-03 | Alps Electric Co., Ltd. | Television signal receiving tuner with frequency-modulation broadcast-band attenuation circuit |
US20020075414A1 (en) * | 2000-12-14 | 2002-06-20 | Alps Electric Co., Ltd. | Television tuner having less distortion |
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10340045B2 (en) | 2014-10-21 | 2019-07-02 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for autoimmune system conditions |
US10347368B2 (en) | 2014-10-21 | 2019-07-09 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics, and therapeutics for cardiovascular disease conditions |
US10347379B2 (en) | 2014-10-21 | 2019-07-09 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics and therapeutics for cutaneous conditions |
US10347366B2 (en) | 2014-10-21 | 2019-07-09 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics, and therapeutics for cardiovascular disease conditions |
US10346589B2 (en) | 2014-10-21 | 2019-07-09 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics |
US10347362B2 (en) | 2014-10-21 | 2019-07-09 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for endocrine system conditions |
US10347367B2 (en) | 2014-10-21 | 2019-07-09 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics, and therapeutics for cardiovascular disease conditions |
US10346588B2 (en) | 2014-10-21 | 2019-07-09 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics |
US10354757B2 (en) | 2014-10-21 | 2019-07-16 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics and therapeutics for cutaneous conditions |
US10354756B2 (en) | 2014-10-21 | 2019-07-16 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics and therapeutics for cutaneous conditions |
US10360346B2 (en) | 2014-10-21 | 2019-07-23 | uBiome, Inc. | Method and system for microbiome-derived diagnostics |
US10360347B2 (en) | 2014-10-21 | 2019-07-23 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for neurological health issues |
US10358682B2 (en) | 2014-10-21 | 2019-07-23 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for conditions associated with microbiome functional features |
US10360348B2 (en) | 2014-10-21 | 2019-07-23 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for neurological health issues |
US10366789B2 (en) | 2014-10-21 | 2019-07-30 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for neurological health issues |
US10366782B2 (en) | 2014-10-21 | 2019-07-30 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics, and therapeutics for cardiovascular disease conditions |
US10366793B2 (en) | 2014-10-21 | 2019-07-30 | uBiome, Inc. | Method and system for characterizing microorganism-related conditions |
US10381117B2 (en) | 2014-10-21 | 2019-08-13 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics and therapeutics for cutaneous conditions |
US10380325B2 (en) | 2014-10-21 | 2019-08-13 | uBiome, Inc. | Method and system for microbiome-derived diagnostics and therapeutics |
US10381112B2 (en) | 2014-10-21 | 2019-08-13 | uBiome, Inc. | Method and system for characterizing allergy-related conditions associated with microorganisms |
US10388407B2 (en) | 2014-10-21 | 2019-08-20 | uBiome, Inc. | Method and system for characterizing a headache-related condition |
US10383519B2 (en) | 2014-10-21 | 2019-08-20 | uBiome, Inc. | Method and system for microbiome-derived characterization, diagnostics and therapeutics for conditions associated with functional features |
US10786194B2 (en) | 2014-10-21 | 2020-09-29 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for conditions associated with microbiome taxonomic features |
US10790042B2 (en) | 2014-10-21 | 2020-09-29 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for endocrine system conditions |
US10790060B2 (en) | 2014-10-21 | 2020-09-29 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for mental health associated conditions |
US10790061B2 (en) | 2014-10-21 | 2020-09-29 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for mental health associated conditions |
US10787714B2 (en) | 2014-10-21 | 2020-09-29 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for conditions associated with microbiome functional features |
US10789334B2 (en) | 2014-10-21 | 2020-09-29 | Psomagen, Inc. | Method and system for microbial pharmacogenomics |
US10790043B2 (en) | 2014-10-21 | 2020-09-29 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for endocrine system conditions |
US10786195B2 (en) | 2014-10-21 | 2020-09-29 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for conditions associated with mircrobiome taxonomic features |
US10796786B2 (en) | 2014-10-21 | 2020-10-06 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for endocrine system conditions |
US10795972B2 (en) | 2014-10-21 | 2020-10-06 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for locomotor system conditions |
US10795970B2 (en) | 2014-10-21 | 2020-10-06 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for locomotor system conditions |
US10796785B2 (en) | 2014-10-21 | 2020-10-06 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for endocrine system conditions |
US10795971B2 (en) | 2014-10-21 | 2020-10-06 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for locomotor system conditions |
US10796800B2 (en) | 2014-10-21 | 2020-10-06 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for mental health associated conditions |
US10803992B2 (en) | 2014-10-21 | 2020-10-13 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for mental health associated conditions |
US10803991B2 (en) | 2014-10-21 | 2020-10-13 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics |
US10803147B2 (en) | 2014-10-21 | 2020-10-13 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for locomotor system conditions |
US10902938B2 (en) | 2014-10-21 | 2021-01-26 | Psomagen, Inc. | Method and system for microbiome-derived diagnostics and therapeutics for endocrine system conditions |
Also Published As
Publication number | Publication date |
---|---|
KR20090003013A (en) | 2009-01-09 |
TW200908726A (en) | 2009-02-16 |
CN101779450A (en) | 2010-07-14 |
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