The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The charged-device-model (CDM) ESD robustness of core circuit with/without the shielding line was studied in a 65-nm CMOS process. Verified in silicon chip, the CDM ESD robustness of core circuit with the shielding line was degraded. The damage mechanism and failure location of the test circuits were investigated in this work.
A 0.39 mA 92 dB dynamic range switch-capacitor (SC) third-order ΣΔ modulator for a digital RF hearing aid in 0.35 μm CMOS is presented here. A modified-feedback topology is used here that effectively achieves a high dynamic range and the low power consumption. In the implementation, the bootstrapping-switch and the low-voltage wide-swing OTA are essentially designed for 1.2 V supply voltage with the...
Three types of MOS-triggered SCR structures: Merged MOS-triggered SCR, compact MOS-triggered SCR and boundary-MOS-triggered SCR devices have been fabricated and compared in 0.13 μm CMOS process for on-chip ESD protection. TLP testing results show boundary-MOS-triggered SCR structures can achieve adjustable and lower switching voltage, smaller turn-on resistance, faster turn-on speed, the best ESD...
There are many emerging research efforts exploring bug-sized mobile autonomous robotic systems that roll, crawl, jump, flap or fly. These concepts introduce numerous challenges in mechanical design, ambulation, sensor subsystems, and autonomous navigation/control. Additionally, all micro-robot or micro-UAV operations are ultimately limited by the availability of a suitable power system, which at small...
A fully differential feedback third-order continuous-time sigma-delta modulator suitable for Mega Hertz wireless communication is presented. Some design optimizations mainly regarding power consumption are demonstrated. The proposed single-bit modulator clocked at 128 MHz achieves 2 MHz signal bandwidth, 11 bits of resolution, 68 dB signal-to-noise ratio and 66 dB dynamic range. Designed in 0.18 μm...
We present a bio-inspired readout integrated circuit (ROIC) for visible and infrared image sensors. At the system level, the architecture relies on an event based readout scheme where only pixels within a programmable range of photon flux rates are output. At the pixel level, a one bit oversampled analog-to-digital converter together with a decimator allows for the quantization of signals up to 26...
A new switch control method for a capacitive DAC architecture has been presented. This has been implemented to make a successive approximation register (SAR) ADC more energy efficient. By splitting the capacitor array into two equal halves and using a unity gain buffer, the proposed architecture reduces the switching energy by 97 percent compared to the conventional switching method. The proposed...
Embedded memory is a critical component of modern SOCs. In highly scaled CMOS, process variability and device aging degradation cause a significant increase in the soft failure rate of embedded SRAMs. As process technology continues to scale, these issues become more pronounced, especially when the device is operating at its minimum operating voltage, VDD MIN. This failure rate can even exceed the...
A voltage reference with low sensibility to temperature and power-supply that can generate flexible reference values (from milivolts to several volts) is proposed. Designed for AMS 0.35 μm CMOS process, the circuit provides a stable output voltage working in the temperature range of -40-150°C. The proposed reference provides a nominal output voltage of 1.358 V with a power-supply of 3.3 V.
The use of adaptive equalizers at the front end of receivers is becoming a necessity as the data rates increase without channel improvements. Adaptive equalizers can be implemented using data-aided or non-data-aided schemes, with the latter requiring less area and power. Previous non-data-aided adaptive schemes implement an asynchronous analog algorithm where the power spectrum of the received signal...
We present an integrated wirelessly powered glucose sensor allowing a functional active system on a contact lens. This sensor IC consists of power management, readout circuitry, wireless communication interface, and energy-storage capacitors in a standard CMOS process with no external components.
The current-steering DACs are commonly used in generating high-frequency signals. A current-steering DAC comprises current cells of various sizes. Each of them contains a current source and a current switch. The DAC static linearity, specified as differential nonlinearity (DNL) and integral nonlinearity (INL), is mainly determined by the mutual matching and the output resistance of the current sources...
In this paper, we present a WiMAX baseband SoC implemented in 90nm and capable of high-speed transmission at 300km/h. This SoC is integrated in a USB device that also includes an RF transceiver for MIMO WiMAX transmission. The baseband transmitter generates a WiMAX waveform according to the IEEE 802.16e Rev2 specification. In this time-division duplex WiMAX system, the uplink subframe is composed...
Some applications of wireless sensor networks (WSN) require long-term deployments and vanishingly-small unit volumes to make them cost effective and unobtrusive. Energy and area-efficient circuits, as well as eliminating off chip components, are critical to meeting these objectives. A conventional WSN node can be fully integrated in CMOS except for the battery, crystal reference, and antenna. Typically,...
A 2-6 GHz WiMAX Low Noise Amplifier (LNA) using active inductor as shunt peaking load in resistive feedback configuration is designed in 0.13-μm CMOS process. This low noise amplifier uses a single active inductor to achieve high gain and input matching which leads to a compact circuit. The simulations show a maximum power gain (S21) of 14.18dB, minimum noise figure (NF) of 2.44dB while the input...
This paper presents a frequency-locked loop (FLL) based SSCG with frequency-to-voltage converter (FVC), that saves area and provides multiple δ with low bandwidth variation. A memoryless Newton Raphson modulation profile with multiple fm is also described.
This work presents a 21.7-to-27.8GHz frequency synthesizer in a 45nm CMOS process that combines a tuning range of 24.8%, a residual phase modulation of 2.57°rms (with integrated phase noise from 100kHz to 100MHz), and a total power dissipation of 40mW. Combined with a frequency multiplier-by-two circuit and a divider-by-two circuit in a sliding-IF configuration, the PLL provides the four source frequencies...
High-current LED drivers suffer from a significant efficiency loss due to the presence of a current regulation element (CRE) in series with the LED. In a conventional driver, either a series current source or a sense resistor acts as a CRE to regulate the LED current (lLED). In this paper, we seek to improve the efficiency by eliminating the series CRE. To this end, we employ a highly accurate current...
Ever-growing demand for higher communication bandwidth in high performance compute systems is driving the need for energy-efficient multi-Gb/s I/O serial links. Improved power efficiency was demonstrated using adaptive supply regulation. However, power losses in the DC-DC converter needed to generate the optimal supply voltage and the difficulty in operating analog circuits at low voltages limit the...
A robust transceiver designed for NRZ signaling beyond 10Gb/s over long-range physical media (including electrical backplanes, copper cables and optical modules) must contend with significant challenges from insertion loss, crosstalk, and reflection. For inter-symbol interference (ISI) cancellation, half-rate decision-feedback equalizer (DFE) with unrolled first tap is widely used to avoid noise amplification...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.