Abstract:
A radio frequency digital-to-analog converter with a programmable current output. In exemplary aspects of the invention, improved apparatus and methods for providing (i) current mirror matching, (ii) enhanced current pulse rising edge performance, (ii) reduced base voltage swing, and (iv) compensated high voltage swing, are provided. The foregoing apparatus and methods can be applied to any RF signal application (wireless or otherwise), including for example wireless cellular handsets.
Abstract:
Improved interpolator and decimator apparatus and methods, including the addition of an elastic storage element in the signal path. In one exemplary embodiment, the elastic element comprises a FIFO which advantageously allows short term variation in sample clocks to be absorbed, and also provides a feedback mechanism for controlling a delta-sigma modulated modulo-N counter based sample clock generator. The elastic element combined with a delta-sigma modulator and counter creates a noise-shaped frequency lock loop without additional components, resulting in a much simplified imterpolator and decimator.
Abstract:
A noise-shaping coder with variable or reconfigurable characteristics is disclosed. In one exemplary embodiment, an improved apparatus for signal modulation is disclosed. The apparatus generally comprises a noise-shaping coder having programmable coefficients, programmable coder order, programmable oversampling frequency, and/or programmable dither. In a second exemplary embodiment, an improved method for implementing noise shaping coding is disclosed. The apparatus generally comprises a means for switching from one order coder to another order coder, as well as switching oversampling frequency.
Abstract:
Methods of fabricating semiconductor structures involve the formation of fins for finFET transistors having different stress/strain states. Fins of one stress/strain state may be employed to form n-type finFETS, while fins of another stress/strain state may be employed to form p-type finFETs. The fins having different stress/strain states may be fabricated from a common layer of semiconductor material. Semiconductor structures and devices are fabricated using such methods.
Abstract:
A method for semiconductor fabrication includes providing (404) channel regions on a substrate including at least one Silicon Germanium (SiGe) channel region, the substrate including a plurality of regions including a first region and a second region. Gate structures are formed (406) for a first n-type field effect transistor (NFET) and a first p-type field effect transistor (PFET) in the first region and a second NFET and a second PFET in the second region, the gate structure for the first PFET being formed on the SiGe channel region. The gate structure for the first NFET includes a gate material having a first work function and the gate structures for the first PFET, second NFET and second PFET include a gate material having a second work function such that multi-threshold voltage devices are provided.
Abstract:
A method of producing a microelectronic device in a substrate comprising a first semiconductor layer, a dielectric layer and a second monocrystalline semiconductor layer, comprising the following steps: etching a trench through the first semiconductor layer and the dielectric layer, and such that the trench delimits one active region of the microelectronic device, chemical vapor etching of the second semiconductor layer, at the level of the bottom wall of the trench, according to at least two crystalline planes of the second semiconductor layer such that an etched part of the second semiconductor layer extends under a part of the active region, filling of the trench and of said etched part of the second semiconductor layer with a dielectric material.
Abstract:
The deposition method comprises providing a substrate with a first mono-crystalline zone made of a semiconductor material and a second zone made of an insulating material. During a passivation step, a passivation atmosphere is applied on the substrate so as to cover the first zone with doping impurities. During a deposition step, gaseous silicon and/or germanium precursors are introduced and a doped semiconductor film is formed. The semiconductor film is mono-crystalline over the first zone and has a different texture over the second zone. During an etching step, a chloride gaseous precursor is applied on the substrate so as to remove the semiconductor layer over the second zone.
Abstract:
The invention relates to an integrated circuit (9), including: - a first cell, comprising: - FDSOI transistors (1c, 1d); - a UTBOX layer (4) lying beneath said transistors; - a first well (94) lying beneath the insulator layer (4) and beneath said transistors, said first well having a first type of doping; - a first ground plane (32) having a second type of doping, located beneath one of said transistors and between the insulator layer (4) and the first well (94); - a first STI (25) separating said transistors and crossing said insulator layer; - a first conductive element (33) forming an electrical connection between the first well (94) and the first ground plane (32), located under said first STI (25); - a second cell including a second well (93); - a second STI (24) separating said cells, crossing said insulator layer (4) and reaching the bottom of said first and second wells.
Abstract:
Method of producing a microelectronic device in a substrate comprising a first semiconductor layer, a first dielectric layer and a second semiconductor layer, comprising the following steps: etching of a trench through the first semiconductor layer, the first dielectric layer and a part of the second semiconductor layer, defining one active region, and such that, at the level of the second semiconductor layer, a part of the trench extends under a part of the active region, etching of the second dielectric layer such that remaining portions of the second dielectric layer forms portions of dielectric material extending under a part of the active region, deposition of a third dielectric layer in the trench such that the trench is filled with the dielectric materials of the second and third dielectric layers and forms an isolation trench.
Abstract:
A USB device, integrated circuit, smart card and method are disclosed. A USB transceiver is connected to a data interface and operable at a respective low speed and full speed configuration. A processor as a USB device controller is operatively connected to the low speed USB transceiver and full speed USB transceiver and operable for transmitting a different device descriptor to a USB host for performing an enumeration depending on whether a low speed or high speed operation is chosen.