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| Number | Title | Issue Date |
| 8045947 | RF power extracting circuit and related techniques In one aspect, the invention is a far-field power extraction circuit which includes an integrated antenna and impedance matching portion and a rectifier portion. The antenna and impedance matching portion includes an antenna configured to be responsive to a propagat... | 10/25/2011 |
| 7826815 | Dynamic selection of oscillation signal frequency for power converter In one embodiment, a method is provided for providing power to a radio-frequency (RF) component capable of operating under multiple communication standards, wherein each standard has a respective operating frequency. The method includes: receiving a communication st... | 11/02/2010 |
| 7660570 | Active step attenuator An active step attenuator can attenuate the RF signal from a cable modem or other RF source. The active step attenuator converts the RF energy into a DC control signal that controls the attenuation applied to the RF signal. The voltage of the control signal is propo... | 02/09/2010 |
| 7444129 | Comb-line wireless filter A comb-line wireless filter (5) includes an input end (505a), an output end (505b), a first transmission line (501b), a second and third transmission line (501a, 501c) each having a curved ... | 10/28/2008 |
| 7346331 | Power management for locking system In an access control system, a method and system for power management. A method of power management in a wireless access control system includes monitoring usage of a transceiver in a remote access point in a wireless access control system, de-activating the transce... | 03/18/2008 |
| 7321259 | Programmable logic enabled dynamic offset cancellation Techniques and circuitry are provided for programmatically controlling signal offsets in integrated circuitry. In one embodiment, a buffer circuit having an offset cancellation circuit receives a signal and transmits the signal to programmable logic circuit. The pro... | 01/22/2008 |
| 7181183 | Telecommunication system incorporating a vanadium redox battery energy storage system A telecommunication system incorporates a vanadium redox battery energy storage system. The vanadium redox battery energy storage system receives and is charged by DC power. Upon power interruption, telecommunication equipment relies on the vanadium redox battery en... | 02/20/2007 |
| 7109845 | Circuit arrangement for signal detection having current mirror with cascode coupled transistors A circuit arrangement for detecting a received signal includes a rectifier with an input connected to a receiving antenna for rectifying an encoded received signal, a signal capacitor connected to an output of the rectifier, a discharge current sink connected to the... | 09/19/2006 |
| 7110729 | Apparatus and method for generating a temperature insensitive reference current A constant current source for generating a constant reference current that is relatively temperature insensitive. The constant current source comprises: i) first circuitry for generating a first output current that increases with increases in temperature; ii) second... | 09/19/2006 |
| 7003270 | Electronic apparatus having radio transmitter An electronic apparatus comprising a radio transmitter is disclosed. In a computer system (1) having a radio transmission circuit (3) of a phase modulation type supplied with power from a power supply (4) of a switching type, the switching frequ... | 02/21/2006 |
| 6999741 | Signal processor and cooling method of the same, and radio receiver including the signal processor and cooling method of the same Provided is a signal processor including a band-pass filter and a low noise amplifier, which are covered with a vacuum insulation layer and cooled by a refrigerator. Further, a getter material where a heater for activation is built therein is installed in the vacuum... | 02/14/2006 |
| 6795697 | RF receiver switches RF switches and methods of use are provided. In one embodiment, a RF switch includes first and second switch assemblies, each comprising an elongate member and a magnetic housing on an end of the member. The magnet is disposed between contact pads for first and seco... | 09/21/2004 |
| 6725027 | Multipath noise reducer, audio output circuit, and FM receiver A multipath noise reducer detects and removes the individual noise spikes occurring in an interval of multipath noise, thereby reducing the multipath noise with minimal distortion of the audio output signal. The multipath noise spikes are detected by comparing a rec... | 04/20/2004 |
| 6349198 | Wireless control system for periodic noise sources A wireless control system for use in system having a plurality of periodic noise sources includes an antenna; an RF receiver connected to the antenna for receiving RF noise from an external periodic noise source; a phase synchronization circuit connected ... | 02/19/2002 |
| 6212411 | Power supply circuit, telecommunication device and method for multiple DC slope power management A power supply circuit includes a line voltage forming circuit and a supply voltage forming circuit. The line voltage forming circuit forms a voltage that is proportional to a line voltage provided by a telecommunication line, and the supply voltage formi... | 04/03/2001 |
| 5438696 | Method and apparatus for controlling radio frequency interference generated by a voltage multiplier A radio communication device (100) having a receiver (110) for receiving a radio frequency (RF) signal includes first and second batteries (140, 175) for generating first and second voltages, respectively, wherein the second voltage is greater than the fi... | 08/01/1995 |
| 4198660 | Supply circuit A D.C. supply circuit for a television receiver which has a load circuit including at least one controllable semiconductor switch, the supply circuit comprising means for rectifying an alternating mains supply, a smoothing circuit connected between the re... | 04/15/1980 |
| 3965426 | Frequency modulated signal pre-amplifier with amplitude modulated signal bypass For use with radio receivers adapted to receive both frequency and amplitude modulated signals, a frequency modulated signal preamplifier adapted to be serially connected between the antenna input lead and antenna connector of such a radio, the pre-amplif... | 06/22/1976 |
