Matches 1 - 50 out of 113 1 2 3 >
Match Document Document Title
7289167 Television tuner including distribution connectors  
A metal frame body has first to fourth side plates and is divided, by a shield plate provided in the metal frame body, into a first compartment area near the first side plate and a second...
7268836 Television tuner device generating intermediate-frequency signal free from harmonic interference of reference signal  
A television tuner device includes a metal frame, including a shielding plate which separates the space defined by the metal frame into a first chamber at a first side plate and a second chamber at...
7158192 Television tuner in which influence from analog signals is suppressed when receiving digital signals  
A high frequency amplifier for amplifying inputted television signals; a mixer for subjecting the television signals which have been amplified to frequency conversion into intermediate frequency...
6876401 FM-broadcast-receivable television tuner for preventing adjacent-channel interference  
A trap circuit system includes a first trap portion and a second trap portion. In the first trap portion, a first capacitor is provided in parallel to a first switch diode. A control voltage is...
6791627 Television signal receiver  
In a television signal receiver for receiving and processing television signals (RF) that comprise modulated video signals and modulated audio signals, a tuner ( 16 ) receives selected television...
6760079 TV tuner unit having a resonance network  
A TV tuner unit uses a frequency-selective element before or after the resonance stage of either a UHF or VHF tuner for separation of UHF signals from VHF signals. Thus, performance is preserved...
6731348 Television tuner having simple layout and capable of receiving FM broadcast signals without interference  
A television tuner includes a mixer circuit for receiving a television signal or an FM signal, and a local oscillator circuit for generating an oscillation signal received by the mixer circuit....
6683656 Video intermediate frequency processing apparatus  
In an image intermediate-frequency processing apparatus, in addition to a first phase locked loop (PLL) for receiving a television broadcast, there is provided a second PLL including a voltage...
6590619 Broadcast sound signal processing circuit  
A semiconductor integrated circuit in which a band-pass filter, a sound detector, and some other circuits are formed on a single semiconductor substrate. The output signal from an AM detector is...
6523178 Video transmission system  
In a video transmission system which transmits video data through an ATM network, the ATM network sets up fixed virtual connections between transmitters and a receiver. In the receiver, a...
6515711 System for correcting an aural carrier signal  
An aural carrier signal is corrected in a common amplifier system wherein the correction serves to reduce cross-modulation distortion of the aural carrier signal caused by non-linearities of the...
6512555 Radio receiver for vestigal-sideband amplitude-modulation digital television signals  
Apparatus for reproducing data from a selected digital television signal, transmitted in packet form as vestigial-sideband (VSB) amplitude-modulation (AM) of a carrier, has a tuner for selecting a...
6335769 Circuit for automatic discrimination of audio intermediate frequencies  
A circuit for automatically discriminating audio intermediate frequencies of a received television signal that has a simple, compact and inexpensive circuit structure and can operate stably. The...
6307595 NTSC/DTV reception apparatus automatically conditioned for NTSC signal reception responsive to 4.5 MHz intercarrier  
Television signal reception apparatus for receiving a television signal selected from among transmitted television signals of different types includes a respective receiver portion for each of the...
6281946 Television receiver  
In a television receiver having a tuner 2 for converting a received signal from an antenna 1 to an intermediate frequency signal and supplying the intermediate frequency signal to a homodyne...
6211925 Video intermediate-frequency signal processing device capable of receiving FM broadcasts  
A video intermediate-frequency signal processing device capable of receiving FM broadcasts, includes a first FM detecting unit for demodulating an intermediate-frequency signal from a sound...
6111613 Receiver for television multiplex broadcasting  
A receiver which receives two-channel multiplex broadcasting by using television sub audio. Two-channel data and/or facsimile data which are multiplexed on the broadcasting sub audio band of the...
6061096 Digital-and-analog-TV-signal receivers, each with single first detector and shared high-band I-F amplification  
Radio receivers for receiving DTV signals, in accordance with the Advanced Television System Committee (ATSC) standard, or analog TV, in accordance with the National Television Systems Committee...
5923378 Using intercarrier signals for detecting NTSC interference in digital TV receivers  
During a period of transition from broadcasting analog TV signals to broadcasting digital TV signals, digital TV reception is susceptible to disruption owing to co-channel interference by analog TV...
5896182 Amplitude modulator  
Amplitude modulator comprising a differential input pair receiving a modulating input signal, and a Gilbert cell multiplying a carrier signal by the modulating input signal; and a second...
5864373 Video signal detection circuit and video signal processing device  
A video signal detection circuit of the present invention is provided with a trapping circuit which traps frequencies corresponding to color sub-carrier wave signal components and which is disposed...
5648823 Circuit configuration for intermediate frequency demodulation and device for video signal processing including the circuit  
A circuit configuration for intermediate frequency demodulation for a video signal processing device includes an intermediate frequency filter to which an input signal converted to an intermediate...
5644368 Composite signal detecting apparatus having associated filter  
A detecting circuit for a composite signal containing a video signal and an audio signal. A filter for attenuating the video and audio signals is provided in a PLL circuit loop disposed in the...
5633690 Automatic gain control circuit of a video processing system and method therefor  
An automatic gain control circuit for controlling gain according to a sound gain controller so as to output a stable video intermediate frequency signal includes a first gain control amplifier...
5523801 Upper and lower adjacent picture signal traps  
To provide a picture intermediate frequency circuit capable of preventing the occurrence of intermodulation beats in a strong electrical field, without affecting in any way the original picture...
5497205 Apparatus for processing BPSK signal transmitted with NTSC TV on quadrature-phase video  
A vestigial-sideband amplitude-modulation transmitter using a balanced modulator for generating a suppressed carrier that is in quadrature phasing with the video carrier of a television signal...
5483297 Sound carrier detecting circuit  
A sound carrier detecting circuit for use in a television or a video tape recorder is disclosed. During the sound carrier detection, the carrier frequency of the sound signals is corrected by...
5337091 Video IF amplifier with auxiliary IF amplifier for intercarrier sound & AFT  
In a television receiver a downconverter responding to a selected television signal respectively supplies its first and second output signals as the input signals of first and second IF amplifiers,...
5305109 Parallel untuned video if amplifiers supplied signals from TV 1st detector via respective input filters  
In TV receiving apparatus, a first IF amplifier chain comprises a first gain-controlled amplifier followed in cascade connection by a second gain-controlled amplifier, and a second IF amplifier...
5270814 Method and apparatus for measuring the linearity of a transmission system by detecting the strength of an intercarrier frequency  
A method and apparatus for measuring and correcting nonlinearities in a transmission system which transmits a modulated wave having a maximum peak level N C and with a frequency band [F 1 , F 2 ...
5198904 Aural carrier correction system and method  
A system and method reduce unwanted aural carrier modulation caused by the visual signal in a common amplification television transmitter which amplifies both an aural signal and the visual signal...
5177613 Quasi-parallel IF with shared saw filter  
A low audio buzz television signal processing system. Both the video IF signal and the sound IF signal are filtered by a shared SAW filter without requiring an additional surface acoustic wave...
5130669 Apparatus for driving a mechanical resonator from a high impedance source  
The present invention concerns a high impedance signal source driving a relatively low input impedance mechanical resonating device such as a ceramic filter having an input impedance which varies...
4974086 Frequency conversion circuit for a color television channel  
A color television channel that includes a video channel and at least one sound channel is converted by means of a low-IF converter from the RF band directly to the baseband by analog quadrature...
4910798 Reverse Nyquist slope filter  
A circuit for providing a mirrored version of a preselected transfer function includes a circuit having the preselected transfer function coupled to receive a signal modulated by a signal that is...
4901151 Television receiving section with digital stages  
A television receiving section includes only a single A/D converter, and, thus, only a single interface between the analog portion and the digital portion. Preferably, the A/D converter is...
4716464 Single channel if for video and audio  
A stereo television receiver processes the picture and intercarrier sound carrier signals in a common intermediate frequency (IF) section. The IF characteristic is modified such that the overall...
4710814 Television sound receiving circuit for at least one sound channel contained in an RF signal  
A television sound receiving circuit for at least one sound channel contained in an RF signal converts the transmitted or already down-converted television signal as a composite signal to the...
4691236 Receiver device in a satellite communication system  
A receiver device for a satellite communication system capable of transmitting in either of two modes detects which transmission mode is currently in effect and adjusts its signal processing and...
4660087 Video signal processing system with offset sound trap  
A first sound filter in a video IF channel of a television receiver exhibits a null response at a frequency slightly less than the 41.25 MHz sound IF carrier signal frequency. A demodulated...
4660088 Quasi-parallel television if suitable for stereo sound reception  
A multiplier for multiplying the modulated sound and picture carriers to produce an intercarrier sound signal in a quasi-parallel sound channel of an IF section has a pair of anti-parallel...
4652924 RF volume control circuit  
A TV remote volume control includes an RF input for receiving the video modulated RF carrier and the audio modulated RF carrier, both with common mode spurious deviation. The audio modulated RF...
4646150 Apparatus and method for stereo television sound  
An apparatus and method are provided for receiving and reproducing stereo television sound. A transmitted television signal is received that contains a first component comprising the sum of first...
4639786 Television sound signal processor  
An IF signal filter in the IF sound channel of a television receiver exhibits peak amplitude responses which are unsymmetrical and slightly offset from the nominal picture and sound carrier...
4633316 Stable low cost 4.5 MHz remodulator  
A cable converter produces a 4.5 MHz intercarrier sound signal from a received television signal for application to one input of a phase lock loop circuit, the other input of which is supplied from...
4630119 Sound detecting circuit  
A differential amplifier (10) used as an IF filter and placed between an IF amplifier (2) and a first sound detector (9) in a television system. The IF amplifier produces IF signals for a sound...
4602288 Intermediate frequency saw filter with nyquist phase modulation correction  
The frequency response of an intermediate frequency filter for an intercarrier sound television receiver is modified to provide a substantially constant gain response portion over a predetermined...
4602287 Intermediate frequency filter with Nyquist phase modulation correction  
The frequency response of an intermediate frequency filter for an intercarrier sound television receiver is modified to provide a substantially constant gain response portion over a predetermined...
4591915 Remote volume control by means of frequency modulation feedback loop  
A TV frequency modulation feedback loop (FMFB) remote volume control includes an RF input and a mixing means with the RF input being connected to and providing one input for the mixing means. A...
4574308 FM Video receiver  
An FM video receiver includes a UHF tuner coupled to an intermediate frequency amplifier. The output of the IF amplifier is coupled to a video IF amplifier and detector. The latter component is...
Matches 1 - 50 out of 113 1 2 3 >