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| Number | Title | Issue Date |
| 8068801 | Electric wave receiving apparatus An electric wave receiving apparatus comprises: an antenna; an amplifier; filter circuits that extract signals in different frequency bands from an output of the amplifier; detector circuits that demodulate time codes from outputs of the filter circuits; automatic g... | 11/29/2011 |
| 7738847 | Automatic gain control for a tuner The circuit arrangement comprises a tuner with a control amplifier and a mixer connected downstream, and an automatic gain control. The automatic gain control contains a weighting filter, which is connected to the output of the mixer, upstream of an intermediate fre... | 06/15/2010 |
| RE41131 | Portable telephone capable of increasing facility of operation In a portable telephone which transmits and receives data having at least one of a voice signal and an image datum which are radio signals, the controlling device controls an amplifier so that a user can hear, at a first state that an ear is not near to a speaker, t... | 02/16/2010 |
| 7412222 | Quadrature correction method for analog television reception using direct-conversion tuners A direct conversion radio frequency (RF) tuner includes a mixer generating I and Q quadrature components. A phase detection circuit generates a phase error measurement between the I quadrature component and the Q quadrature component. A phase correction circuit corr... | 08/12/2008 |
| 7389102 | Method to improve CMFB phase margin of variable-output-bandwidth mixer An improved method and apparatus for using common mode feedback to maintain a predetermined DC level for an intermediate frequency output signal. A common mode feedback capacitor-select switch module is operable to use a bandwidth control signal from a radio interfa... | 06/17/2008 |
| 7356321 | Radio frequency tuner A radio frequency tuner is provided for selecting channels from a cable distribution network or other reception system. The tuner has one or more stages whose performance, such as signal to noise plus intermodulation, and gain are functions of the stage power consum... | 04/08/2008 |
| 7283800 | Adaptive mixer output filter bandwidth control for variable conversion gain down-conversion mixer An improved adaptive mixer for use in the down conversion module of a wireless transceiver. The adaptive mixer comprises a conversion gain module that is operable to receive a radio frequency signal and to generate an intermediate frequency that is provided to a rad... | 10/16/2007 |
| 7263341 | Audio demodulating circuit and television broadcast receiver An audio demodulating circuit in accordance with the present invention for demodulating audio signals in a plurality of broadcast systems of mutually different frequency deviations such as the NTSC and the PAL, is arranged such that a connection between a trap circu... | 08/28/2007 |
| 7260387 | Mute-until feature for electronic devices An electronic device such as a cell phone, PDA, or handheld gaming device is provided with a mutable function such as an alarm function, a mute function, and a mute-until function. The mute function mutes the mutable function until deactivated. The mute-until functi... | 08/21/2007 |
| 7227591 | Apparatus and method for receiving television and radio broadcasting signals using a single tuner There is provided a combined TV and FM radio receiver for selectively receiving TV and FM radio signals via a single tuner using a digital intermediate frequency (IF) stage. The receiver includes a tuner that selects TV band or FM radio band signals and converts the... | 06/05/2007 |
| 7221918 | Digital DC-offset correction circuit for an RF receiver An RF receiver comprising a radio-frequency (RF) down-converter for receiving and down-converting an input RF signal to a lower frequency analog signal (e.g., an IF signal or baseband signal) and analog processing circuitry for receiving the lower frequency analog s... | 05/22/2007 |
| 7203471 | System and method for selectively utilizing an attenuation device in a two-way radio receiver based on squelch detect and radio signal strength indication (RSSI) A system and method used for controlling an attenuator in a two-way communication device (100, 200) includes the steps of measuring (211) a relative signal strength indication (RSSI) at the input of the two-way communications device. The RSSI measureme... | 04/10/2007 |
| 7200141 | Bandwidth detection in a heterogeneous network with parallel and proxy modes Effective bandwidth of a communication link is determined in a heterogeneous, packet switched network between a source and a destination, where effective bandwidth is defined as the actual available bandwidth between the server and the client, minus the overhead of ... | 04/03/2007 |
| 7191024 | Remote control method and apparatus, remote controller, and apparatus and system based on such remote control When a user gives a parameter storage instruction via a remote controller, current settings of parameters in an input switching circuit, surround circuit, graphic equalizer and electronic volume are stored into a non-volatile RAM. Then, once the user gives a reprodu... | 03/13/2007 |
| 7171178 | Tuning circuit having amplitude-varying function A tuning circuit having an amplitude-varying function is disclosed that comprises a coil, a capacitor, and a resistance-adjusting element connected in parallel to the coil and the capacitor for varying resistance at time of resonance of the tuning circuit, wherein t... | 01/30/2007 |
| 7171176 | Tuner system self adaptive to signal environment A circuit and method for adjusting the operating characteristics of a tuner in accordance with information derived from the signals being processed by the tuner. Depending upon signal type and/or signal strength, the power levels of certain components are adjusted a... | 01/30/2007 |
| 7149492 | Method to improve CMFB phase margin of variable-output-bandwidth mixer An improved method and apparatus for using common mode feedback to maintain a predetermined DC level for an intermediate frequency output signal. A common mode feedback capacitor-select switch module is operable to use a bandwidth control signal from a radio interfa... | 12/12/2006 |
| 7113028 | Method and arrangement for calibrating an active filter The invention relates to a calibration method and a calibration arrangement for an active filter intended to be used especially in portable radio apparatus. The filter (100) according to the invention is an active RC filter and it is integrated except for one... | 09/26/2006 |
| 7065334 | Variable gain amplifier device A variable gain amplifier device controlled by a first gain control signal comprises a gain controlled amplifier having a gain and including a differential pair of first and second MOS type transistors configured to operate in a weak inversion region; and a control ... | 06/20/2006 |
| 7035609 | Method and apparatus for automatically identifying an antenna connected to a radio transmitter and for automatically controlling a transmitter A transmission system or apparatus includes a transmitter or source of transmitted RF or microwave power which is selectively connectable via a transmitter connector to an antenna having an antenna feed via an antenna connector so that a variety of antennas with dif... | 04/25/2006 |
| 7031684 | Variable gain amplifier device A variable gain amplifier device controlled by a first gain control signal comprises a gain controlled amplifier having a gain and including a differential pair of first and second MOS type transistors configured to operate in a weak inversion region; and a control ... | 04/18/2006 |
| 7003053 | Digital broadcast receiver The invention provides a digital broadcast receiver which comprises a tuner 1 for selecting the desired broadcasting station from among a plurality of broadcasting stations, a demodulator circuit 3 for decoding a plurality of bit frames constituting th... | 02/21/2006 |
| 6961401 | Retractable pedometer A portable device, such as a pedometer or other device having a display portion that may be separated from an attachment portion for easier viewing. When separated, the display portion remains connected to the attachment portion to facilitate ease of re-attachment a... | 11/01/2005 |
| 6944427 | Reduced crossmodulation operation of a multimode communication device A method to reduce crossmodulation in a multimode radio communication device with a transmitter, a receiver, and a second receiver (400) that operates in a receiver channel bandwidth (402) includes a step of measuring a first signal strength in the rec... | 09/13/2005 |
| 6785522 | Method for changing timbre during conversation in cellular phone The invention relates to a cellular phone terminal system, and in particular to a method for changing timbre of a voice signal during conversation in a cellular phone terminal system having a filter for filtering a PCM input signal. The method comprises the steps of... | 08/31/2004 |
| 6760635 | Automatic sound reproduction setting adjustment Apparatus, article of manufacture, and method for automatic adjustment of sound reproduction settings on an audio or audio/visual system based on listener preference and/or experience is provided. In one embodiment, an audio system includes an apparatus for adjustin... | 07/06/2004 |
| 6748092 | Hearing aid with improved percentile estimator The invention relates to a hearing aid, preferably a programmable hearing aid, having at least one microphone (1), at least one signal processor with at least one channel, an output amplifier (9) and an output transducer (10), at least one of th... | 06/08/2004 |
| 6690925 | Portable telephone capable of increasing facility of operation In a portable telephone which transmits and receives data having at least one of a voice signal and an image datum which are radio signals, the controlling device controls an amplifier so that a user can hear, at a first state that an ear is not near to a... | 02/10/2004 |
| 6658245 | Radio receiver having a dynamic bandwidth filter and method therefor A radio receiver (100) has an IF (intermediate frequency) filter (200) for dynamically adjusting its intermediate frequency. The filter (200) includes a filter bank (301), power/amplitude estimator circuits (308, 310, 312), and weighting circuits (314, 31... | 12/02/2003 |
| 6553084 | Digital automatic gain control linearizer and digital automatic gain control circuit using the same A digital automatic gain control linearizer for controlling a variable gain control element for automatically controlling gain, using an analog signal obtained by converting input digital data includes a memory an average calculation unit. The memory outp... | 04/22/2003 |
| 6433673 | Digital enunciator, process and communication system employing same A receiver in a communication system is coupled to a transmission channel for receiving communication signals transmitted over a transmission channel. The receiver includes signal receiving electronics for receiving communication signals directed to the r... | 08/13/2002 |
| 6242982 | Amplifier with self setting automatic gain control circuit An amplifier (125) having automatic gain control (AGC) includes a gain stage (220), having a variable amplifier (215), for amplifying a signal received by the amplifier (125). The amplifier (125) also includes an AGC circuit (228) that adjusts amplificati... | 06/05/2001 |
| 6233462 | Portable terminal device for automatically controlling transmitting voice level and calling sound level A comparing unit 18, when a radio unit 1 receives a radio signal, compares an ambient noise level detected by a noise sensor 17 with a preset threshold value. If the ambient noise level is smaller than the threshold value, the comparing unit 18 outputs a ... | 05/15/2001 |
| 6175730 | Radio receiver with a potentiometer as volume control A radio receiver with a potentiometer as the volume control is described, wherein an unintentional displacement of the potentiometer during the switched-off phase becomes effective only with a delay when the radio receiver is switched on by means of a swi... | 01/16/2001 |
| 6169569 | Cable modem tuner A cable modem is configured to include a tuner having a front end which includes a duplex filter stage and a decoupler stage and a rear end which includes a single conversion tuner. The duplex filter stage couples the tuner to a network, a computer system... | 01/02/2001 |
| 6128478 | Apparatus and method for amplifying a radio frequency signal A communication device employs a method and apparatus for amplifying a radio frequency (RF) signal that eliminates the need for a signal splitter. An RF input signal (202) is coupled to a first RF amplifier stage (206) only. A signal coupler (222) couples... | 10/03/2000 |
| 6049722 | Radio communication apparatus for use in dual-mode radio communication system and having factor variable control means dependent on the set mode A dual mode radio communication apparatus according to the invention has a reception speech signal output circuit for processing an analog demodulation signal in an analog mode and a digital demodulation signal in a digital mode by means of a common signa... | 04/11/2000 |
| 6043721 | Dual band amplifier An amplifier (104) for a dual band device includes multiple amplifier stages coupled between an input (103) and output (105). The amplifier stages include a first amplifier stage (200) having a first amplifier (206), a second amplifier stage (202) having ... | 03/28/2000 |
| 5940143 | High-definition television signal receiving apparatus and gain control circuit thereof An automatic gain controlling circuit and a high-definition television signal receiving apparatus includes an input terminal for receiving a signal including first and second signal components creating interference, a first automatic gain controlling ampl... | 08/17/1999 |
| 5884153 | Delayed automatic gain control circuit A delayed automatic gain control circuit using a simple delayed AGC voltage generation section and capable of fixing a start point of AGC in an RF amplification section at a predetermined received signal level without performing a special adjusting operat... | 03/16/1999 |
