Microsemi Corp-analog Mixed Signal Group, Ltd.

Shimon Cohen

Gabi Levhar

Dror Korcharz

Alon Zeev Ferentz

Eli Ohana

Nadav Barnea

A sense current generation apparatus constituted of: a main electronically controlled switch arranged to provide a current path for an input current; a sense electronically controlled switch arranged to generate a sense current; a voltage matching circuit arranged to adjust the voltage across the first and second terminals of the sense switch to equal the voltage across the first and second terminals of the main switch, within a predetermined maximum error voltage, such that the sense current is representative of the input current; and a voltage governor arranged to: receive an indication of the voltage across the first and second terminals of the main switch; and responsive to the received voltage indication, adjust the control voltage of the main switch such that the absolute value of the voltage across the terminals thereof is maintained above a predetermined voltage threshold greater than a boundary of the error range.

Sense current generation apparatus and method

A method of providing a wide range of input currents for an analog to digital converter (ADC), the method constituted of: receiving an input current; selecting one of a plurality of selectable ratios; and generating at least one sense current, the magnitudes of the at least one generated sense current and the received input current exhibiting the selected ratio, wherein the ADC is arranged to receive a voltage representation of the at least one generated sense current.

Method and apparatus for wide range input for an analog to digital converter

A port current control arrangement, constituted of: a current source arranged to generate a reference current or a predetermined value; an on-chip reference resistor, the generated reference current arranged to produce a reference voltage across the on-chip reference resistor; an on-chip sense resistor, a port current arranged to flow through the on-chip sense resistor and produce a sense voltage across the on-chip sense resistor, wherein the resistance of the on-chip sense resistor exhibits a predetermined relationship with the resistance of the first on-chip reference resistor; and a current control circuit, a first input of the current control circuit arranged to receive the produced reference voltage and a second input of the current control circuit arranged to receive the sense voltage, wherein the current control circuit is arranged to limit the port current to a value responsive to the received reference voltage and the received sense voltage.

On-chip port current control arrangement

An input circuitry for an ADC constituted of: a first resistor coupled to an input of the ADC; a second resistor coupled to the input of the ADC and arranged to provide a current path; an electronically controlled switch coupled to the first resistor and arranged to provide a parallel current path through the first resistor; and a control circuitry; wherein the control circuitry is arranged to operate in a high current mode in the event that the input current exhibits an intensity within a first predetermined range and is arranged to operate in a low current mode in the event that the input current exhibits an intensity within a second predetermined range, different than the first predetermined range, wherein, in the high current mode the control circuitry is arranged to close the electronically controlled switch and in the low current mode is arranged to open the electronically controlled switch.

Wide range input current circuitry for an analog to digital converter

A power over Ethernet controller comprising: a control circuitry; at least one powering port, each of the at least one powering port comprising a unique means for controlling a switch associated therewith; and at least one current limiter, each of the at least one current limiter being associated with a unique one of the at least one powering port, each of the at least one current limiter being operable to limit the current through the controlled switch to a particular one of a plurality of values, each of the values being in excess of 100 mA, the particular value being selected responsive to the control circuitry.

Growing community of inventors

Burgata, Israel

Shimon Cohen