| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 375309000 | Keying circuits | 7 |
| 20100046670 | Method and Apparatus for Multiple Bit Encoding - Methods and apparatus for encoding data for wireless transmission are disclosed in which a data message may be encoded into a transmission code as a first coding format and a second coding format. The first coding format characterized by a first bit representation and the second coding format characterized by a second bit representation different from the first bit representation. The transmission code may be transmitted having the first and second coding formats. | 02-25-2010 |
| 20110075763 | LOCAL WIRELESS SIGNAL TRANSMITTING/RECEIVING APAPRATUS AND METHOD USING DIGITAL RADIO FREQUENCY PROCESSING TECHNOLOGY - A local wireless signal transmitting/receiving apparatus and method using digital RF processing technology. When the local wireless signal transmitting/receiving apparatus generates a local wireless signal to be transmitted, spreads the frequency of the generated local wireless signal and thereby generates a baseband signal, the local wireless signal transmitting/receiving apparatus converts the baseband signal of the local wireless signal into phase information, converts the phase information into an RF signal by means of a polar modulator, and transmits the RF signal. | 03-31-2011 |
| 375311000 | Automatic | 2 |
| 20090316832 | Increasing Channel Capacity Without Needing to Reduce Signal to Noise Margin Due to Inter-Symbol Interference (ISI) by Using Three States +1, -1 and NO - Basic idea is that in addition to sending +1 and −1 a third state is sent. This third state is a lack of any transmission whatsoever. Suggests sending frequency 0 for symbol 0, frequency 1 for symbol 1, frequency 2 for symbol 2, frequency 0 & frequency 1 for symbol 3 etc. Also suggests using 2 frequencies and phase modulating each. Frequency 1 has 2 possible phase states and frequency 2 has 2 possible phase states, therefore 4 bits can be coded. If send only frequency 2 with its two phase states, this enables us to send two more bits. If send neither frequency 1, nor frequency 2 this indicates 1 other bit state. Therefore 8 bits can be coded. | 12-24-2009 |
| 20110249772 | TRANSMITTER, MULTICARRIER TRANSMITTING METHOD, AND RECEIVER - A transmitter modulates for each symbol period a plurality of carriers that include a carrier group that is consisted of a plurality of prescribed carriers, and repeatedly transmits control information in cycles by using the carrier group. The transmitter transmits multiple-bit binary data of the control information in each symbol period, thereby transmitting the control information once in each of the cycles that includes at least one symbol period. The transmitter controls the transmission unit to switch, within the carrier group, for each of the cycles, carriers of bits of the control information, according to a prescribed rule. | 10-13-2011 |
| 375312000 | Power or bias voltage supply keying | 3 |
| 20120263258 | CIRCUITS AND METHODS FOR PROVIDING A CONTROL VOLTAGE AND IMPROVING SWITCH PERFORMANCE IN RADIO FREQUENCY (RF) MODULES - An apparatus comprises at least one transmit amplifier and rectification circuitry located in the at least one transmit amplifier, which is configured to receive a RF signal and provide a rectified voltage, which is selectably added to a voltage supplied by a battery to generate a DC voltage supply signal that is a function of RF power level. A controller is configured to select between providing the VBAT or the VSupply signal to a transmit switch depending on one or more of a logic state and a mode of operation. An alternate apparatus comprises a charge pump circuit configured to quickly raise a voltage supplied to it and store the output voltage on a capacitor and then either shift a first frequency provided by a charge pump oscillator to a lower second frequency or turn off a charge pump clock to maintain a voltage on the capacitor during a transmit mode. | 10-18-2012 |
| 20150304137 | TRANSMISSION GATE FOR BIAS VOLTAGE GENERATION - An apparatus includes a transmission gate configured to generate a signal based on a first differential input signal and a second differential input signal. The apparatus further includes biasing circuitry responsive to the transmission gate and configured to output a bias voltage based on the signal. | 10-22-2015 |
| 20160080181 | METHODS AND STRUCTURES TO GENERATE ON/OFF KEYED CARRIER SIGNALS FOR SIGNAL ISOLATORS - An oscillator for a signal isolator system includes a capacitor and an inductor connected in parallel, two pairs of cross-coupled switches and a control switch. The capacitor, the inductor and the cross-coupled switches form an oscillator. The control switch controls operation of the oscillator between an ON state and an OFF state in response to a data signal to be communicated across an isolation barrier. The inductor may be formed from a winding of an isolation transformer, which reduces component count as compared to a system that provides a separate inductor. Other embodiments may include a current-supplying kickstart circuit and a shorting transistor that can speed transition between the ON and OFF states. | 03-17-2016 |
