Mihai A Sanduleanu

8344795, Jan 1, 2013

Jan 20, 2011

13/010249

Mihai Sanduleanu - Yorktown Heights NY, US
Ping-Yu Chen - Hsinchu, TW

International Business Machines Corporation - Armonk NY

H03K 5/00

327554, 327552

An exemplary filter includes N (≧2) unity gain amplifiers, each with a pair of differential input terminals and a pair of differential output terminals; a pair of filter differential input terminals; a first pair of variable resistances coupling the pair of filter differential input terminals to the pair of differential input terminals of the first unity gain amplifier; N−1 pairs of variable resistances coupling the pairs of differential output terminals of each of the N unity gain amplifiers, other than the last one, to the pairs of differential input terminals of its downstream neighbor; N−1 pairs of variable capacitances coupling the pairs of differential input terminals of each of the N unity gain amplifiers, other than the last one, to the pairs of differential output terminals of its downstream neighbor; and a variable capacitance coupling the pair of differential input terminals of the last unity gain amplifier to each other.

20130027243, Jan 31, 2013

Jul 10, 2012

13/545437

Aydin Babakhani - Houston TX, US
Duixian Liu - Scarsdale NY, US
Scott K. Reynolds - Amawalk NY, US
Mihai A. Sanduleanu - Yorktown Heights NY, US

International Business Machines Corporation - Armonk NY

G01S 13/89

342179

Systems and method for near-field millimeter wave imaging are provided, in particular, near-field millimeter wave imaging systems and methods that enable sub-wavelength resolution imaging by scanning objects with sub-wavelength probe elements and capturing and measuring phase and intensity of reflected energy to generate images.

20130027244, Jan 31, 2013

Aug 31, 2012

13/600930

Aydin Babakhani - Houston TX, US
Duixian Liu - Scarsdale NY, US
Scott K. Reynolds - Amawalk NY, US
Mihai A. Sanduleanu - Yorktown Heights NY, US

International Business Machines Corporation - Armonk NY

G01S 13/89

342179

Systems and method for near-field millimeter wave imaging are provided, in particular, near-field millimeter wave imaging systems and methods that enable sub-wavelength resolution imaging by scanning objects with sub-wavelength probe elements and capturing and measuring phase and intensity of reflected energy to generate images.

20130194042, Aug 1, 2013

Jan 30, 2012

13/361001

Mihai A. Sanduleanu - Yorktown Heights NY, US
Alberto Valdes Garcia - Hartsdale NY, US
David Goren - Nesher, IL
Shlomo Shlafman - Haifa, IL
Danny Elad - Moshav Liman, IL

INTERNATIONAL BUSINESS MACHINES CORPORATION - Armonk NY

H03F 3/191

330302

A multi-stage amplifier is provided that uses tunable transmission lines, as well as a calibration method for the multi-stage amplifiers. A multi-stage amplifier, comprises a plurality of tunable amplification stages, wherein each of the tunable amplification stages comprises a tunable resonator based on a transmission line having a tunable element. The tunable elements may vary a capacitance or an inductance to tune a frequency of an applied signal. A calibration method is provided for a multi-stage amplifier having a plurality of transmission lines, an input stage and an output stage. The multi-stage amplifier is calibrated by generating a signal to determine a frequency for a substantially maximum power; generating an error signal by comparing the frequency for the substantially maximum power with a desired frequency; varying a digital control code applied to each of the tunable transmission lines, input stage and output stage until the error signal satisfies predefined criteria.

20130332096, Dec 12, 2013

Jun 7, 2012

13/491210

Mihai A. Sanduleanu - Yorktown Heights NY, US

INTERNATIONAL BUSINESS MACHINES CORPORATION - Armonk NY

G01R 29/26
G06F 19/00

702 69, 324613

A device and method for measuring jitter includes a capacitive element capable of being selectively charged, wherein the selection is made by a received signal from which an accumulated jitter value is to be determined. An analog-to-digital converter is coupled to the capacitive element to determine a voltage across the capacitive element after a number of cycles of the received signal. A determination module is coupled to the analog-to-digital converter to output the accumulated jitter value of the received signal using the voltage, wherein the accumulated jitter value is accumulated over the number of cycles.

7952421, May 31, 2011

Nov 8, 2005

11/719209

Lorenzo Tripodi - Eindhoven, NL
Mihai A.T. Sanduleanu - Yorktown Heights NY, US
Pieter G. Blanken - Nuenen, NL

ST-Ericsson SA - Geneva

H01L 35/00

327513, 327538, 327512

The present invention relates to an improved PTAT current source and a respective method for generating a PTAT current. Opportune collector currents are generated and forced in two transistors exploiting the logarithmic relation between the base-emitter voltage and the collector current of a transistor. A resistor senses a voltage difference between the base-emitter voltages of the two transistors, which can have either the same or different areas. A fraction of the current flowing through the resistor is forced into a transistor collector and mirrored by an output transistor for providing an output current. By this principle an all npn-transistor PTAT current source can be provided that does not need pup transistors as in conventional PTAT current sources. The invention is generally applicable to a variety of different types of integrated circuits needing a PTAT current reference, especially in modern advanced technologies as InP and GaAs where p-type devices are not available. For example, the PTAT current source circuit of the invention can be used in radio frequency power amplifiers, in radio frequency tag circuits, in a satellite microwave front-end.

20210011116, Jan 14, 2021

Jul 16, 2019

16/512861

- Armonk NY, US
MARK FERRISS - TARRYTOWN NY, US
ARUN S. NATARAJAN - WHITE PLAINS NY, US
BENJAMIN D. PARKER - PEEKSKILL NY, US
JEAN-OLIVER PLOUCHART - NEW YORK NY, US
SCOTT K. REYNOLDS - AMAWALK NY, US
MIHAI A. SANDULEANU - YORKTOWN HEIGHTS NY, US
ALBERTO VALDES GARCIA - HARTSDALE NY, US

G01S 7/02
H01Q 3/28
H01Q 3/36
H04B 1/48

Polarimetric transceiver front-ends and polarimetric phased array transceivers include two receive paths configured to receive signals from an antenna, each including a respective variable phase shifter. A first transmit path is connected to the variable phase shifter of one of the two receive paths and is configured to send signals to the antenna. A transmit/receive switch is configured to select between the first transmit path and the two receive paths for signals. The transmit/receive switch has an element that adds a high impedance to the transmit path when the transmit/receive switch is in a receiving state.

20150362583, Dec 17, 2015

Aug 27, 2015

14/837671

- Armonk NY, US
MARK FERRISS - TARRYTOWN NY, US
ARUN S. NATARAJAN - WHITE PLAINS NY, US
BENJAMIN D. PARKER - PEEKSKILL NY, US
JEAN-OLIVER PLOUCHART - NEW YORK NY, US
SCOTT K. REYNOLDS - AMAWALK NY, US
MIHAI A. SANDULEANU - YORKTOWN HEIGHTS NY, US
ALBERTO VALDES GARCIA - HARTSDALE NY, US

G01S 7/02
H01Q 3/36
H01Q 3/28

A polarimetric transceiver front-end includes two receive paths configured to receive signals from an antenna, each receive path corresponding to a respective polarization. Each front-end includes a variable amplifier and a variable phase shifter; a first transmit path configured to send signals to the antenna, where the transmit path is connected to the variable phase shifter of one of the two receive paths and includes a variable amplifier; and a transmit/receive switch configured to select between the first transmit path and the two receive paths for signals, where the transmit/receive switch includes a quarter-wavelength transmission line that adds a high impedance to the transmit path when the transmit/receive switch is in a receiving state.