Patents by Inventor Janardhana Bhat
Janardhana Bhat has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8494096Abstract: A multi-channel receiver (200) comprises: an input (111) for receiving a wideband signal potentially comprising multiple channels, a tuner stage (110), a wideband amplifier (201) connected between the input (111) and the tuner (110), a controllable switch (202) bridging the amplifier (201) and a switch controller (203) designed to generate a switch control signal (BSC). For controlling the switch, the switch controller (203) is designed to measure at least one signal quality parameter and to generate its switch control signal (BSC) on the basis of the measured parameter. The decision of switching the switch (202) to its open state (amplifier active) is exclusively taken during at least one time interval when the receiver is switched to a channel.Type: GrantFiled: June 3, 2011Date of Patent: July 23, 2013Assignee: TP Vision Holding B.V.Inventors: Janardhana Bhat, Maarten Heuvelman
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Publication number: 20110228171Abstract: A multi-channel receiver (200) comprises: an input (111) for receiving a wideband signal potentially comprising multiple channels, a tuner stage (110), a wideband amplifier (201) connected between the input (111) and the tuner (110), a controllable switch (202) bridging the amplifier (201) and a switch controller (203) designed to generate a switch control signal (BSC). For controlling the switch, the switch controller (203) is designed to measure at least one signal quality parameter and to generate its switch control signal (BSC) on the basis of the measured parameter. The decision of switching the switch (202) to its open state (amplifier active) is exclusively taken during at least one time interval when the receiver is switched to a channel.Type: ApplicationFiled: June 3, 2011Publication date: September 22, 2011Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: JANARDHANA BHAT, MAARTEN HEUVELMAN
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Patent number: 7983365Abstract: A multi-channel receiver (200) comprises: an input (111) for receiving a wideband signal potentially comprising multiple channels, a tuner stage (110), a wideband amplifier (201) connected between the input (111) and the tuner (110), a controllable switch (202) bridging the amplifier (201) and a switch controller (203) designed to generate a switch control signal (BSC). For controlling the switch, the switch controller (203) is designed to measure at least one signal quality parameter and to generate its switch control signal (BSC) on the basis of the measured parameter. The decision of switching the switch (202) to its open state (amplifier active) is exclusively taken during at least one time interval when the receiver is switched to a channel.Type: GrantFiled: October 1, 2003Date of Patent: July 19, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Janardhana Bhat, Maarten Heuvelman
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Patent number: 7643099Abstract: Television systems comprising tuners (1), controllers (2) for controlling tuners (1), and stages (3) for receiving tuned signals from tuners (1) and for supplying control signals to controllers (2), use time-consuming automatic fine tuning signals while high speed tuning. By using lock signals (53) from phase-locked-loops (31) in stages (3) as control signals, an indication whether a channel is active or not can now be got much quicker due to lock signals being much faster available than automatic fine tuning signals. By using synchronization signals (54) from synchronization generators (4) as further control signals, a further indication is got. In a fast tuning mode, frequencies nearby active channels are detected, and in a fine tuning mode, channel frequencies are identified.Type: GrantFiled: September 18, 2003Date of Patent: January 5, 2010Assignee: Koninklijke Philips Electronics N.V.Inventors: Janardhana Bhat, Akbar Hassan Syed, Teck Tem Leong
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Publication number: 20070147553Abstract: A multi-channel receiver (200) comprises: an input (111) for receiving a wideband signal potentially comprising multiple channels, a tuner stage (110), a wideband amplifier (201) connected between the input (111) and the tuner (110), a controllable switch (202) bridging the amplifier (201) and a switch controller (203) designed to generate a switch control signal (BSC). For controlling the switch, the switch controller (203) is designed to measure at least one signal quality parameter and to generate its switch control signal (BSC) on the basis of the measured parameter. The decision of switching the switch (202) to its open state (amplifier active) is exclusively taken during at least one time interval when the receiver is switched to a channel.Type: ApplicationFiled: October 1, 2003Publication date: June 28, 2007Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Janardhana Bhat, Maarten Heuvelman
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Publication number: 20070070255Abstract: Television systems comprising tuners (1), controllers (2) for controlling tuners (1), and stages (3) for receiving tuned signals from tuners (1) and for supplying control signals to controllers (2), use time-consuming automatic fine tuning signals while high speed tuning. By using lock signals (53) from phase-locked-loops (31) in stages (3) as control signals, an indication whether a channel is active or not can now be got much quicker due to lock signals being much faster available than automatic fine tuning signals. By using synchronization signals (54) from synchronization generators (4) as further control signals, a further indication is got. In a fast tuning mode, frequencies nearby active channels are detected, and in a fine tuning mode, channel frequencies are identified.Type: ApplicationFiled: September 18, 2003Publication date: March 29, 2007Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.Inventors: Janardhana Bhat, Akbar Syed, Teck Leong
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Publication number: 20060072034Abstract: The display device has a cathode ray tube (T), which has an electron gun (G) for generating an electron beam and an outer conductive layer (AD). A video processing circuitry (VP) provides a video signal (Vo) having a black level (BLR, BLG, BLB) to a video amplifier (VA) for modulating the electron beam. The video processing circuitry (VP) has black level controlling circuitry (BL) for controlling the black level (BLR, BLG, BLB) of the video signal (Vo). A sensing circuit (S) senses a black current level of the electron beam corresponding to the black level of the video signal (Vo) and feeds back information about the black current level to the black level controlling circuitry (BL) for stabilizing the black current level. The sensing circuit (S) is coupled to a node (X) to which the outer conductive layer (AD) and one of the output terminals of a high-tension generator (H) are coupled.Type: ApplicationFiled: December 18, 2003Publication date: April 6, 2006Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.Inventors: Janardhana Bhat, Chun Wu
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Publication number: 20050018088Abstract: A television apparatus (100) is switchable to a radio receiver mode. The radio signal is processed in a picture processing path of the television apparatus, transformed to a predetermined auxiliary intermediate radio carrier frequency (fIR) within the picture pass band of the picture processing path, such that the relationship fIR=fref,i?fD is satisfied, fref,i being an intrinsic reference frequency of a PLL reference signal generator, and fD? being the frequency distance between a predetermined intermediate picture carrier frequency (fIP) and a predetermined intermediate sound carrier frequency (fIS) for television signals.Type: ApplicationFiled: November 20, 2002Publication date: January 27, 2005Inventor: Janardhana Bhat
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Patent number: 6791627Abstract: 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 signals and furnishes at least intermediate frequency (IF) signals, a SAW filter (17) is connected to the tuner (16), a video demodulator (18) demodulates the video signals from the SAW filter (17) to obtain demodulated video signals for further processing, a generator (16) supplies signals (SIF) comprising the modulated audio signals on a carrier frequency equal to the difference between a carrier frequency of the modulated video signals and a carrier frequency of the modulated audio signals in the television signals, an audio demodulator (5) demodulates audio signals from the signals (SIF) from the generator (16) to obtain demodulated audio signals for further processing. According to the invention, the generator (16) is connected with the tuner (16) and the audio demodulator (5) is connected with the generator (16).Type: GrantFiled: June 26, 2001Date of Patent: September 14, 2004Assignee: Koninklijke Philips Electronics N.V.Inventor: Janardhana Bhat
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Patent number: 6496017Abstract: Apparatus and method for measuring an antenna signal strength (X). The apparatus includes a first amplifier section (3) for receiving an antenna signal and having a first automatic gain control stage; a second amplifier section (8) having a second automatic gain control stage; an automatic gain control system (12; 16′) for generating automatic gain control signals (VRF AGC, VIF AGC) for the first and second amplifier sections in accordance with a delayed automatic gain control scheme with a take-over-point. In order to measure the antenna signal strength, the take-over-point is automatically shifted towards the actual antenna signal strength.Type: GrantFiled: January 29, 2001Date of Patent: December 17, 2002Assignee: Koninklijke Philips Electronics N.V.Inventor: Janardhana Bhat
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Publication number: 20020012074Abstract: 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 signals and furnishes at least intermediate frequency (IF) signals, a SAW filter (17) is connected to the tuner (16), a video demodulator (18) demodulates the video signals from the SAW filter (17) to obtain demodulated video signals for further processing, a generator (16) supplies signals (SIF) comprising the modulated audio signals on a carrier frequency equal to the difference between a carrier frequency of the modulated video signals and a carrier frequency of the modulated audio signals in the television signals, an audio demodulator (5) demodulates audio signals from the signals (SIF) from the generator (16) to obtain demodulated audio signals for further processing. According to the invention, the generator (16) is connected with the tuner (16) and the audio demodulator (5) is connected with the generator (16).Type: ApplicationFiled: June 26, 2001Publication date: January 31, 2002Inventor: Janardhana Bhat
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Publication number: 20010028244Abstract: Arrangements and methods for measuring an antenna signal strength (X) are described, the arrangement comprising:Type: ApplicationFiled: January 29, 2001Publication date: October 11, 2001Inventor: Janardhana Bhat