Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

I/O Systems

Analog-digital-cascade-converter

Single tape cartridge access port

The present invention provides an access port for loading and retrieval of single tape cartridges ...

Five and one-quarter inch form factor combination DAT tape drive and cassette magazine loader

It is therefore the primary object of the present invention to provide a combination DAT tape drive ...

Optical disk playback and recording device which alternately allocates logical addresses on different sides of disk

Accordingly, it is an object of the present invention to provide an optical disk playback and ...

Composite drive controller including composite disk driver for supporting composite drive accesses and a pass-through driver for supporting accesses to stand-alone SCSI peripherals

The problems outlined above are in large part solved by a drive array controller with a SCSI pass-...

Method and system for converting computer peripheral equipment to SCSI-compliant devices

The present invention is directed to a conversion apparatus attachable to a peripheral device which ...

Image acquisition architecture

The present invention addresses the foregoing by providing an image acquisition architecture ...

Inter-system transport mechanism for use with robotic data cartridge handling systems

The present invention is directed to a mechanism for transporting data cartridges between two or ...

Optical information recording medium which uses diffraction grating

We claim: 1. An optical information recording medium characterized in that at least one cell ...

Control apparatus for controlling data flow between a control processing unit and peripheral devices

What I claim is: 1. In a data processing system, a peripheral control apparatus for controlling the ...

Successive approximation S/D converter with inherent quantization error centering

It is the object of the present invention to provide a synchro to digital successive approximation ...

Analog digital cascade converter

Details

Inventors: Tung, Pham N.;
Assignee: Thomson Hybrides et Microondes (Paris, FR)
Primary Examiner: Shoop, Jr.; William M.
Assistant Examiner: Logan; Sharon D.
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt

In an analog-digital converter working at microwave frequencies, the input signal is addressed in parallel to bit levels which are in cascade with one another. Each bit level has a transducer which converts the voltage into a current, and compares this current with a calibrated source. The resultant current is addressed to a logic circuit, the output of which delivers a bit. An intermediate output of the logic circuit constitutes a control signal which regulates the currents of the analog comparators of the less significant bit levels. The calibrated currents are in geometrical progression.

DETAILED DESCRIPTION More precisely, the invention concerns an analog-digital converter converting an input analog signal into an output digital signal formed by several bits, wherein the input signal is addressed in parallel to one and the same set of several bit level circuits connected with one another in cascade, each level being formed by: a transducer stage which converts the input voltage into a current which is proportionate to it, an analog comparator stage which compares said current with a calibrated current given by several elementary current sources, a logic circuit stage, a first output of which gives a control signal applied to the elementary current sources of the less significant bit levels, and a second output which delivers a bit of the digital signal.

Related patents

	Portable computer capable of switching CPU clocks The present invention has been made in consideration of the above situation, and has as its object to provide a mechanism for arbitrarily switching clock frequencies ...
	Method for maintaining data integrity during information transmission by generating indicia representing total number of binary 1's and 0's of the data This invention may be briefly described as an improved method for maintaining the integrity of data transmission between discrete separated data processing system ...
	Data processor with on-chip logical addressing and off-chip physical addressing An object of the present invention is to provide a data processor which can reduce conflict during access of an instruction control unit and an instruction execution ...
	Flexible mode DES system OF THE INVENTION (The reader should note that nearly all description below applies to encryption of decryption circuits but the explanations are limited, for the most ...
	Sigma delta modulator with distributed prefiltering and feedback OF A PREFERRED EMBODIMENT FIG. 7 shows a block diagram of the inventive sigma delta modulator. A comparison of FIG. 7 and FIG. 2 indicates that the inventive modulator ...
	Method and system for controlling exclusive access to shared resources in computers What is claimed is: 1. An exclusive control method for a computer system for controlling an obtaining process, which obtains an exclusive control module indicating an ...
	Disk file apparatus Accordingly, it is a primary object of the present invention to provide a disk file apparatus wherein the cartridge loading or the cartridge extraction may be performed ...
	Automatic exchanging system for storage and retrieval of magnetic tape cassettes The present invention has been developed in order to remove the drawbacks inherent to the conventional automatic cassette exchanging systems. It is therefore an object ...
	Tape changer for loading and unloading a magazine of magnetic tape cartridges The present invention has an object to overcome the above-mentioned drawbacks of the conventional techniques by providing a cartridge changer in which a certain ...
	Cartridge loader for loading each of a plurality of cartridges into a cartridge insertion slot The present invention comprises a loader for a drive having a cartridge acceptor, including a housing defining an opening, a holder, an assembly for aligning the holder, ...

0.004
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved