Did You Know...
...that two musicians were responsible for the invention of color print film? Fascinated by photography, Leopold Godowsky and Leopold Mannes worked together to produce an easy-to-use, practical color film. They worked full time as music teachers and gave concerts while experimenting during their off hours in Mannes' kitchen. Their success earned them full-time, well-paying jobs at Kodak and their efforts resulted in Kodachrome film, which was introduced in 1935.
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| Number | Title | Issue Date |
| 8150349 | Apparatus and method for audio conversion An apparatus and method for audio conversion is provided to upgrade the resolution of transmission frequency of an FM (frequency modulation) transmitter and reduce the size of the FM transmitter by applying frequency coarse tune and fine tune. The apparatus comprise... | 04/03/2012 |
| 7558546 | Selectable high-side/low-side mix for high intermediate frequency (IF) receivers A method in which one of a high-side mix mode and a low-side mix mode is selected in response to an interference characteristic of a desired channel of a radio frequency (RF) input signal is disclosed. In the high-side mix mode, a direct digital frequency synthesize... | 07/07/2009 |
| 7403747 | Tuning a station A method of tuning a station is disclosed, wherein a first pilot signal is applied on a circuit of the station and the resulting output power of the signal circuit is subsequently detected. A second pilot signal is then applied to the circuit and the resulting outpu... | 07/22/2008 |
| 7366486 | System and method for coarse/fine PLL adjustment An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circu... | 04/29/2008 |
| 7359687 | System and method for obtaining comprehensive vehicle radio listener statistics A system, apparatus, method and computer program product to obtain comprehensive vehicle radio listener statistics based on parameters such as radio status (e.g., on/off status and CD/Tape/AM/FM setting), radio volume, station preset information, current frequency s... | 04/15/2008 |
| 7358885 | Mixing DAC architectures for a radio frequency receiver A receiver (300) includes a mixing digital-to-analog converter (DAC) (118A), a direct digital frequency synthesizer (DDFS) (132) and a dynamic element matching (DEM) circuit (304). A DAC of the mixing DAC (118A) is implemented as a... | 04/15/2008 |
| 7340230 | Receiver architectures utilizing coarse analog tuning and associated methods Receiver architectures and associated methods are disclosed that provide initial analog coarse tuning of desired channels within a received signal spectrum, such as a set-top box signal spectrum for satellite communications. These architectures provide significant a... | 03/04/2008 |
| 7295822 | Radio wave receiver, radio-controlled timepiece and tuning capacitance setting method A radio wave receiver for receiving radio waves having a predetermined frequency, the receiver comprises an antenna, an variable capacitor connected to the antenna, a memory, and a controller which determines an optimum capacitance of the variable capacitor with whi... | 11/13/2007 |
| 7286804 | Receiver digital-analog converter and tuning circuit An object of the present invention is to provide a receiver, a digital-analog converter and a tuning circuit in which temperature compensating components can be formed on a semiconductor substrate while reducing component costs. An FM receiver 100 is constitu... | 10/23/2007 |
| 7274410 | Broadband integrated tuner A broadband integrated receiver for receiving input signals and outputting composite video and audio signals is disclosed. The receiver employs an up-conversion mixer and a down-conversion mixer in series to produce an intermediate signal. An intermediate filter bet... | 09/25/2007 |
| 7236024 | Configurable circuit structure having reduced susceptibility to interference when using at least two such circuits to perform like functions A PLL function may be implemented as a dual-loop structure having a first PLL circuit which generates an intermediate signal from the reference signal, and a second PLL circuit which generates an output signal from the intermediate signal. The intermediate signal fr... | 06/26/2007 |
| 7236212 | System and method for providing a low power receiver design An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circu... | 06/26/2007 |
| 7224951 | PMA RX in coarse loop for high speed sampling A device and a method for processing high data rate serial data includes circuitry for recovering a clock based on the high data rate input data stream. A transceiver includes a coarse loop of a phase-locked loop that selectively provides a clock having accuracy tha... | 05/29/2007 |
| 7224948 | Transmitter and radio communication terminal using the same There are provided a transmitter and a wireless communication terminal apparatus using the same for solving a problem of undesired spurs due to harmonics of an output signal of a frequency synthesizer, and further solving a problem of the undesired spurs occurring w... | 05/29/2007 |
| 7199664 | Integrated switchless programmable attenuator and low noise amplifier An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circu... | 04/03/2007 |
| 7184724 | System and method for frequency translation using an image reject mixer Frequency translation, such as frequency up conversion of a video baseband or intermediate frequency to a desired frequency division broadcast channel, is provided utilizing a single sideband or image reject mixer and filtering having relaxed selectivity requirement... | 02/27/2007 |
| 7177640 | Method of scanning channel of digital television A method of scanning channels in a digital television including (a) setting a starting frequency; (b) searching for a first available digital channel by searching a search frequency that is the starting frequency; adding a predetermined scan step to said search freq... | 02/13/2007 |
| 7174190 | Serial bus interface for direct conversion receiver A direct downconversion receiver architecture having a DC loop to remove DC offset from the signal components, a digital variable gain amplifier (DVGA) to provide a range of gains, an automatic gain control (AGC) loop to provide gain control for the DVGA and RF/anal... | 02/06/2007 |
| 7171181 | Method for achieving immediate and accurate automatic frequency tuning An automatic frequency tuning (AFT) system which can effect immediate and accurate automatic frequency tuning of the local oscillator (LO) of a receiver, in order to achieve a stable intermediate frequency (IF) signal while reducing the power consumption and the cos... | 01/30/2007 |
| 7167694 | Integrated multi-tuner satellite receiver architecture and associated method Multi-tuner receiver architectures and associated methods are disclosed that provide initial analog coarse tuning of desired channels within a received signal spectrum, such as transponder channels within a set-top box signal spectrum for satellite communications. T... | 01/23/2007 |
| 7127010 | Oscillator controlling A receiver local oscillator is always tuned to a frequency that lies within a range of reception frequencies of the receiver. The oscillator is tuned to a frequency less than and above the received frequency when the received frequency is above and below a threshold... | 10/24/2006 |
| 7092675 | Apparatus and methods for generating radio frequencies in communication circuitry using multiple control signals A radio-frequency (RF) apparatus capable of transmitting RF signals includes transmitter path circuitry. The transmitter path circuitry includes a voltage-controlled oscillator (VCO) that generates an output signal. The frequency of the output signal of the VCO circ... | 08/15/2006 |
| 7092043 | Fully integrated tuner architecture An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circu... | 08/15/2006 |
| 7079195 | Broadband integrated tuner A broadband integrated receiver for receiving input signals and outputting composite video and audio signals is disclosed. The receiver employs an up-conversion mixer and a down-conversion mixer in series to produce an intermediate signal. An intermediate filter bet... | 07/18/2006 |
| 7080393 | Receiver having a preset tuner A receiver includes a CPU. The CPU, when executing preset registration, in step S1 first searches for the presence or absence of receivable channels. If there are receivable channels, received data (center frequency, etc.) is registered in step S2. If ... | 07/18/2006 |
| 7076221 | Digital automatic fine tuning method and apparatus Disclosed herein is a digital automatic fine tuning method and apparatus, which is capable of detecting a difference between a nominal frequency and an intermediate frequency generated in a tuner using a counter, and applying the counted data of the counter as a fin... | 07/11/2006 |
| 7076224 | Process for controlling the gain of a frequency tuner, and corresponding tuner, in particular for the reception of terrestrial digital television signals A method and device are disclosed for receiving digital television signals by a frequency tuner. The power of the signal is measured after an analog/digital conversion in the frequency tuner, and the gain thereof is controlled on the basis of this power measurement ... | 07/11/2006 |
| 7050778 | Direct conversion turner A direct conversion tuner down-converts television signals, cable signals, or other signals directly from an RF frequency to an IF frequency and/or baseband, without an intermediate up-conversion step for image rejection. The direct conversion tuner includes a pre-s... | 05/23/2006 |
| 7023948 | Frequency converter arrangement A frequency arrangement with at least two successive heterodyne stages, one of which converts an input signal with an adjustable first frequency of a superposition oscillator that can be set in fine frequency increments into a first intermediate frequency, a second ... | 04/04/2006 |
| 7024170 | Frequency conversion apparatus A plurality of frequency conversion sections is provided, each of which comprises a first frequency mixer for converting the frequency of the input frequency signal by a signal from a first oscillator; a first filter for extracting an element signal from the output ... | 04/04/2006 |
| 7019595 | Frequency synthesizer with automatic tuning control to increase tuning range A phase control loop circuit for tuning to a reference frequency signal having a phase lock loop (PLL) circuit being responsive to a reference frequency signal having a reference frequency, said PLL circuit including a voltage control oscillator (VCO) for generating... | 03/28/2006 |
| 7002427 | Filter trimming An adjustable phase shifter generates a phase shifted reference signal by introducing a phase shift in a reference signal. A phase detector identifies a phase difference between the reference signal and the phase shifted reference signal. A control signal generator ... | 02/21/2006 |
| 6980775 | Automatic frequency control (AFC) system and method using an adaptive threshold to improve accuracy of the direct current (DC) component calculation for a received signal A radio device requires a tunable transceiver such that the transceiver can be accurately set to a desired frequency. When a signal with known frequency accuracy is being received, an offset detector can determine the frequency offset generated by the transceiver du... | 12/27/2005 |
| 6970030 | Dual phased-locked loop structure having configurable intermediate frequency and reduced susceptibility to interference A PLL function may be implemented as a dual-loop structure having a first PLL circuit which generates an intermediate signal from the reference signal, and a second PLL circuit which generates an output signal from the intermediate signal. The intermediate signal fr... | 11/29/2005 |
| 6952565 | Communication terminal, automobile communication terminal, and automobile The present invention provides a communication terminal that enables precise communications with optimum receive sensitivity at any time regardless of any change in peripheral environments of an antenna thereof. The communication terminal including means for transmi... | 10/04/2005 |
| 6938271 | Television receiving apparatus A microcomputer 50 discriminates a CATV channel plan mode only if there is a continuous channel among the channels that have been judged that station is present as a result of determination in the case where the count number for a TV channel plan is smaller t... | 08/30/2005 |
| 6931243 | Fully integrated low noise multi-loop synthesizer with fine frequency resolution for HDD read channel and RF wireless local oscillator applications A low noise multi-loop radio frequency synthesizer receives an input reference signal having a frequency fR, into a fine tune PLL and a coarse tune PLL. The fine tune PLL outputs a fine tune signal with a frequency fR□P, P beings an integer, ... | 08/16/2005 |
| 6925290 | Radio receiver A radio receiver embodying the present invention comprises, a front-end circuit for selecting a broadcasting wave of a certain frequency from broadcasting waves received, a memory for storing a channel registering table, tuning key, and a control circuit. A channel ... | 08/02/2005 |
| 6925291 | Electronic alignment system for a television signal tuner An electronic alignment system for a television signal tuner utilizes first and second controllers for generating respective first and second control signals for respective first and second signal processing circuits of a signal processing arrangement, with the firs... | 08/02/2005 |
| 6917390 | Intermediate-frequency coupled-circuit for television tuner An intermediate-frequency (IF) coupled-circuit for a television tuner is provided, which is connected between an IF amplifying stage and a video-signal-selection filter, and which comprises a parallel circuit having a second capacitor connected in parallel to a seri... | 07/12/2005 |
