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Hands free towel carrying system

A hands free towel carrying system for coupling a towel to a user to prevent loss, theft or contamination.

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Class 330/199 - WITH POWER OR BIAS VOLTAGE SUPPLY


Subclass of Class 330 - Amplifiers
Definition: Subject matter in which the "source of electrical
No. of applications: 15
Last issue date: 05/03/2012


Application No.Application TitleIssue Date
20120105154Switching Power Supply
Methods and systems for enhancing system efficiency in a power amplification, modulation, and transmission system are provided. Embodiments include determining output power characteristics of a selected modulation scheme to be employed in data transmission, determining ...
05/03/2012
20100289576HIGH EFFICIENCY POWER AMPLIFIER POWER ARCHITECTURE
A distributed power converter is for use with an RF power amplifier and includes a primary converter connected to an input voltage and configured to provide a regulated DC intermediate voltage that is galvanically isolated from the input voltage. Additionally, the distr...
11/18/2010
20100244957POWER CIRCUITS FOR POWER AMPLIFIERS AND COMMUNICATION SYSTEMS USING THE SAME
A power circuit for a power amplifier which operates in an inactive period and an active period is provided and includes a power supply unit, a current limiting unit, a storage unit, and a converting unit. The power supply unit provides a first current. The current limi...
09/30/2010
20100148867Audio Out Unit
A DC-coupled audio out unit is provided, including at least one regulator and at least one audio amplifier. The regulator is coupled to at least one power terminal of the audio amplifier....
06/17/2010
20100102879METHOD AND APPARATUS FOR AUTOMATICALLY CONTROLLING AN XNN® ENHANCEMENT CIRCUITRY FEEDING A POWER AMPLIFIER
Method and apparatus for automatically controlling the operation of a DC power enhancement circuitry connected to an RF power amplifier (PA) that operates at various input signal levels, according to which the instantaneous magnitude of the input signal is sensed and th...
04/29/2010
20100073088Joint optimisation of supply and bias modulation
There is disclosed a technique for controlling at least one amplification stage, comprising: selecting a linearity objective for the amplification stage; in dependence on an input signal to said amplification stage, determining a combination of supply input and bias inp...
03/25/2010
20100060358Compensating for variations in the response of a power supply
Apparatus includes an equalizer having a signal input, a control input and an output; a controllable power supply having a control input and an output, the input of the controllable power supply being coupled to the output of the equalizer; a power amplifier having a ma...
03/11/2010
20090302941Joint optimisation of supply and bias modulation
A radio frequency amplifier system is disclosed in which the amplifier bias supply and power supply voltages are >instantaneously modulated with signals derived from the envelope voltage of the input signal. Separate non-linear mapping functions are used to derive th...
12/10/2009
20090302939POWER AMPLIFIER WITH DIGITAL PRE-DISTORTION
A power amplifier using a digitally pre-distorted compound semiconductor transistor is discussed. The amplifier has improved linearity. For a given gate bias voltage, there exists a drain voltage at which the drain current is the same for a pulsed signal as for a DC sig...
12/10/2009
20090295475TRANSFORMER-CAPACITOR ENHANCEMENT CIRCUITRY FOR POWER AMPLIFIERS
Circuitry for providing improved pulse-type enhancement of the voltage supplied to a power amplifier (101) that is fed by a power supply that is connected to the power amplifier (101) at a feeding point through a main supply path that is connected via an i...
12/03/2009
20090159784INTEGRATED CIRCUIT DEVICE AND IMAGING APPARATUS USING INTEGRATED CIRCUIT DEVICE
An integrated circuit device of the present invention includes a plurality of signal processing circuits classified into a plurality of groups, each signal processing circuit including an amplifier circuit for amplifying an input electric signal and a bias circuit havin...
06/25/2009
20090128236High Efficiency Amplification
A radio frequency amplification stage comprising: an amplifier for receiving an input signal to be amplified and a power supply voltage; and a power supply voltage stage for supplying said power supply voltage, comprising: means for providing a reference signal represen...
05/21/2009
20080136527High Impedance Circuit
A signal amplifier circuit comprises a signal amplifier having an input for receiving an ac signal to be amplified and an amplifier biasing arrangement coupled between the signal input and a dc voltage line, the arrangement comprising a diode means and a bootstrapping a...
06/12/2008
20070052477Efficient power supply for rapidily changing power requirements
A highly efficient power supply, a method for supplying power, and a method for arranging a power supply, for a UHF or microwave radio frequency amplifier intended for operation with a signal that has a power level which varies at a high frequency rate. The power supply...
03/08/2007
20060028271HIGH EFFICIENCY AMPLIFICATION
There is disclosed a radio frequency amplification stage comprising: an amplifier for receiving an input signal to be amplified and a power supply voltage; and a power supply voltage stage for supplying said power supply voltage, comprising: means for providing a refere...
02/09/2006
 
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