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| Number | Title | Issue Date |
| 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 |
| 7269035 | Switching device and related operating method A switching device and a method of operating a switching power element are disclosed for generating a train of drive pulses (D1 to D32) in a basic pattern for a repetition cycle time (T to TF) having leading time intervals (Th1 to Th3, Th... | 09/11/2007 |
| 7190982 | Radio frequency device In the present radio frequency device, a radio frequency circuit part and a transmission line are disposed on the top surface of a circuit board on the surface of which a ground pattern is provided, and a metal shielding cap is fixed to the circuit board so as to co... | 03/13/2007 |
| 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 |
| 7076229 | Circuits with improved power supply rejection Circuit comprising a noise suppressing circuitry (40) having an input (42) for a first voltage (VDD) and an output (43) for providing a supply voltage (VDDfiltered). The circuit further comprises a MOSFET-based switch (41) with a MOSFET (... | 07/11/2006 |
| 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 |
| 6658244 | Method and circuit for compensation control of offset voltages in a radio receiving circuit integrated in a circuit module Offset voltage compensation in baseband in a radio receiver path is achieved by control and programming signals which are required in any case to set the desired states in the circuit module. For this purpose a sequencer is started which is integrated on ... | 12/02/2003 |
| 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 |
| 6307151 | Technique for reducing low frequency interference noise A technique for reducing low frequency baseband interference noise is disclosed. The low frequency baseband interference noise typically takes the form of low frequency magnetic interference emanating from a power source providing low frequency switching ... | 10/23/2001 |
| 6009337 | Method and arrangement for interference-protected power supply The invention relates to an interference-protected method and arrangement for supplying power, wherein the power supply between main devices and a masthead preamplifier of a base station in a cellular radio system takes place through an antenna line, and ... | 12/28/1999 |
| 5890059 | Impulse noise blanking apparatus A method and apparatus for suppressing noise in a radio receiver or the like due to electromagnetic interference generated by the firing of a spark plug which coordinates the operation of a noise blanker with the EST signal generated by an electronic engi... | 03/30/1999 |
| 5519889 | Method and apparatus to conceal RF interference in AM radio reception caused by a switch mode power supply A method and apparatus is disclosed in which a transformer which has at least one DC output and one input, and a precision timer which generates a control signal having a frequency within a predetermined range of an integer multiple of the carrier frequen... | 05/21/1996 |
| 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 |
| 5410720 | Apparatus and methods for generating an AC power signal for cable TV distribution systems A cable TV distribution system in which an AC power signal is generated according to the following steps: (a) generating an AC power signal having at least a positive half-cycle, where the positive half-cycle comprises a rising portion, a falling portion,... | 04/25/1995 |
| 4996484 | Method and apparatus for cancelling powerline noise in geophysical electromagnetic exploration The present invention is used to cancel a narrow band noise of know frequency, such as 60 Hz noise generated by powerlines, in electromagnetic receiving equipment. A cancelling antenna is wrapped around the sensing antenna of the electromagnetic receiver ... | 02/26/1991 |
| 4606076 | Communication receiver system having a voltage converter with an operating frequency below the receiver IF A communication receiver system for receiving coded signals and of the type having at least one predetermined intermediate frequency (IF) signal comprising a decoder for detecting and decoding the received coded signals and a DC/DC voltage converter circu... | 08/12/1986 |
| 4584714 | Automotive radio receiver with radio frequency interference elimination circuit An automotive radio receiver with a radio frequency interference elimination includes a noise detector adapted to detect noise in the power source wiring and a circuit for eliminating radio frequency interference noise. The detector is physically connecte... | 04/22/1986 |
| 4525870 | Automotive radio receiver with radio frequency interference elimination circuit An automotive radio receiver with a radio frequency interference elimination includes a noise detector adapted to detect noise in the power source wiring and a circuit for eliminating radio frequency interference noise. The detector is physically connecte... | 06/25/1985 |
| 4355422 | Tunable radio receiver with detuning prevention due to power supply variations In a varactor diode tunable receiver supplied with operating current from batteries, the invention proposes to insert a blocking diode between the supply terminal of the playback amplifier and the input of the stabilizing circuit producing a stabilized tu... | 10/19/1982 |
| 4153879 | Shock muting circuit for use in an AM receiver A switch-off shock muting circuit for use in an AM receiver comprising a muting element disposed in a signal transmission path extending from the antenna through the demodulation and low frequency amplifying sections to the speaker of the receiver, a powe... | 05/08/1979 |
| 4114097 | Frequency shift signal receiver A frequency shift receiver for periodically receiving frequency shift (FS) signals while cyclically turning on and off a power supply for a preceding section of the receiver. An output from the discriminator is turned on and off in synchronism with the tu... | 09/12/1978 |
| 3995219 | Interference suppression circuit for automobile radio receivers A pulse amplifier with its input across the power supply leads to an automobile radio receiver to be protected against pulse interference is used to operate a blanking gate interposed between the demodulator of the receiver and the low-frequency circuits ... | 11/30/1976 |
