Periodic signal analyzer using a randomly varied phase shifting circuit

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The Philips Electronics North America Corporation patent solves the following problem:

The present invention relates generally to digital signal systems and procedures and particularly the systems and procedures that an input signal is sampled in the form of a digital signal is then processed to generate a signal indicative of amplitude of input signal.

Our analysis of this patent is as follows:

Philips Electronics North America Corporation’s patent US 5847558 A deals with Periodic signal analyzer using a randomly varied phase shifting circuit.
A signal sampling circuit receives a clock signal indicating a sampling rate and a periodic signal input to produce a digitized sampled output signal. The example of the signal applied to an all-pass filter with a single pole / zero pair of pole / zero values ​​are determined in a number supplied by a number generator. The number generator differ apply that number to a random or pseudorandom trends make a corresponding random or pseudorandom variation of the transfer function of filter. The filtered sample signal then further processed by an absolute value operator and an average value operator for the application of an amplitude responsive device such as a meter. The random or pseudorandom difference filter transfer functions indicate a corresponding random or pseudorandom differential phase shift imposed on the sampled signal into the filter. It. about moving work to prevent or prohibit the generation of false distinction beat note amplitude in the example signal for input signals with frequencies at or near the sampling rate or its submultiples.

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Operating mobile stations of wireless communication systems in multiple modes by external control

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The Telefonaktiebolaget Lm Ericsson patent solves the following problem:

Applicants' invention relates to electrical telecommunication, and especially to the wireless communication system, such as cellular and satellite radio systems, for various types of operations (Analog, digital, two-way, etc. ), and access techniques such as frequency division multiple access (FDMA), time division multiple access (TDMA), code division multiple access (CDMA), and hybrid FDMA / TDMA / CDMA. The specific aspects of the invention is directed to techniques for improving the procedures for receiving and transmission of information.

Our analysis of this patent is as follows:

Telefonaktiebolaget Lm Ericsson’s patent US 5845215 A deals with Operating mobile stations of wireless communication systems in multiple modes by external control.
A creative way and gave support for a plurality of mobile stations in operation with a wireless communication system with user control. At present, communication protocols available to support the end user equipment operating in a manner of operation. However, it is desirable to combine protocols from various technologies in the form of end user equipment work in many ways the operation. Thus, the present method allows the mobile station to operate in an environment of multi-mode where a user can give a mode.

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Large-diameter introducer sheath having hemostasis valve and removable steering mechanism

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The Medtronic, Inc. patent solves the following problem:

Field of Invention

Our analysis of this patent is as follows:

Medtronic, Inc.’s patent US 5843031 A deals with Large-diameter introducer sheath having hemostasis valve and removable steering mechanism.
A catheter introducing system includes an introducer catheter comprising a flexible sheath having a hemostasis valve, and an obturator having a steering mechanism operated by a proximal actuator shaft. The catheter introducer system usually introduced obturator within the flexible sheath to the obturator can implement steering lapta deflecting the distal end of the joint sheath and obturator. Such catheter to introduce the system particularly useful for large diameter body which can not be easily identified in the guide wire. A first exemplary hemostasis valve consists of a compressed foam insert with an axial lumen. The second model hemostasis valve comprising an elastomeric enclosed receives his mark on the catheter.

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