STMicroelectronics

About: STMicroelectronics is a company organization based out in Geneva, Switzerland. It is known for research contribution in the topics: Transistor & Signal. The organization has 17172 authors who have published 29543 publications receiving 300766 citations. The organization is also known as: SGS-Thomson & STM.

ESD protection circuit

Abstract: An ESD protection circuit and structure for integrated circuit devices uses a lateral NPN transistor to provide a low resistance discharge path for ESD transient voltages. A preferred structure also includes a modification to an N-channel output drive transistor to eliminate the parasitic bipolar transistor that induces snapback.

13.5 A −97dBm-sensitivity interferer-resilient 2.4GHz wake-up receiver using dual-IF multi-N-Path architecture in 65nm CMOS

Abstract: Wake-up receivers are considered as practical solutions to enable ultra-low-power (ULP) wireless sensor nodes (WSN) in a dense environment A low data-rate (<∼50kb/s) wake-up receiver (WuRX) should facilitate a long sensor lifetime, optimal network latency and strong interferer resilience Moreover, such sensor nodes should be ultra-low-cost compact objects This paper presents a 24GHz WuRX with −97dBm sensitivity for 10kb/s and 103 BER, operated from a single 05V supply On-off keying (OOK) modulation has been chosen for its energy efficiency, with a cascaded multilayer N-path filter approach offering superb interferer rejection while avoiding expensive off-chip resonant components such as BAWs or crystals

System and method for packet messaging and synchronization

Abstract: System and method for packet messaging and synchronization through a packet based display interface includes using a multiple packet transport protocols, translating packet messages between protocols and achieving time code synchronization with a packet protocol between multiple devices in a multimedia network. A packet based display interface includes a dual data transport module to communicate packet messages using first and second packet transport protocols across a bidirectional link and a media transport module to communicate video packets across a unidirectional link. A method for communicating packet messages between source and slave devices in a multimedia network includes translating messages between different packet transport protocols. An apparatus for synchronizing a sink device to a source device includes a counter module configured to be adjusted based on a received source global time code value and a transport module to transmit a sink global time code value to the source device.

Electroluminescence properties of light emitting devices based on silicon nanocrystals

Abstract: We have fabricated MOS devices where the dielectric layer consists of a substoichiometric SiO x (x thin film , annealed at 1100°C for 1 h to induce the separation of the Si and SiO 2 phases, with the formation of silicon nanocrystals (nc) embedded in the insulating matrix. We have studied the electroluminescence (EL) properties of such devices as a function of the current density and of the temperature. We have evaluated the excitation cross section of Si nc under electrical pumping at room temperature and at low temperature (12 K ) . Moreover, we have used the experimental EL intensities and decay times to evaluate the radiative rate as a function of the temperature.

Method and apparatus for operating polyphase dc motors

Abstract: A circuit for operating a polyphase dc motor, for example of the type having a plurality of "Y" connected stator coils, has circuitry for unambiguously determining the actual instantaneous position of the rotor of the motor, circuitry for determining a desired rotor position precedent to executing a desired commutation sequence, and circuitry for executing the desired commutation sequence when the circuit for determining the actual instantaneous position of the rotor detects that the rotor is actually in the desired rotor position. The circuitry for unambiguously determining the actual instantaneous position of the rotor includes a back emf amplifier switchably connected to at least one floating coil, and circuitry for determining when the voltage received by the back emf amplifier crosses a reference voltage from a predetermined direction. In one embodiment, the circuit, includes mask circuitry for inhibiting the reference voltage crossing detection circuitry for a predetermined time after a change in the commutation sequence. The mask circuitry includes clocked up and first and second down counters, the second down counter being inhibited to be clocked until the first down counter has reached a predetermined count, and the reference voltage crossing circuitry being inhibited until at least the second down counter has completed its count. When a reference voltage crossing is detected, the count of the up counter is loaded into both the first and second down counters, then the up counter is reset to begin a new commutation period count.