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Spin Transfer Torque (STT) switching realized using a Magnetic Tunnel Junction (MTJ) device has shown great potential for low power and non-volatile storage. A prime application of MTJs is in building non-volatile Look Up Tables (LUT) used in reconfigurable logic. Such LUTs use a hybrid integration of CMOS transistors and MTJ devices. This paper discusses the reliability of STT based LUTs under transistor...
In this paper, we present a low power hybrid spin-CMOS 5-bit Flash Analog Data Converter (ADC). Our design is based on domain wall motion based spin switches with switching current and delay of ∼50μA and 1ns, respectively, with low impedance input that enables low power operation. Spin switches can be an attractive alternative to the ‘power hungry’ comparators generally used in CMOS-based Flash ADCs...
This paper presents an alternative linear topology for conditioning resistive sensors. This topology allows us to obtain an inherently linear relationship between the variable measured by the sensor and its corresponding output, which is not always valid for the topologies most commonly employed in industrial applications, such as the Wheatstone bridge. SPICE simulations of this alternative topology...
To further extend the scaling trend of traditional CMOS technology, many hybrid architectures integrating emerging device technologies have been proposed recently. Among them, memristor based cross-point memory (MBCPM) demonstrates great potential in data storage and computation. However, accessing a cross-point memory inevitably induces currents flowing through those unselected cells, called as sneak...
In this paper, we present a single chip nanosensor composed of Single-Walled Carbon Nanotubes (SWNTs) integrated on complementary metal oxide semiconductor (CMOS) circuitry with custom designed on-chip amplifiers for chemical agent detection. The SWNTs were integrated on CMOS circuitry utilizing a low temperature and low voltage Dielectrophoretic (DEP) assembly process. Furthermore, we incorporated...
An integrated lossless inductor current-sensing method is proposed. Its core is the using of a Gm-C filter, whose frequency response matches the inductor time-constant. In order to fit different types and values of inductors, tuning and calibration process is introduced in for self-matching ahead of normal loop control. For applying the proposed method to a 4-switch buck-boost converter, some special...
A high-speed current mode sense amplifier for Spin Torque Transfer Magnetic Random Access Memory (STT MRAM) is proposed. The sense amplifier is designed in a 0.18 μm CMOS technology, and 1.8 V supply voltage. The resistance values of high state is 2132 Ω, low state is 1215 Ω, and reference state is 1512 Ω, respectively. The proposed sense amplifier decreases the dropping rate of input bias. In particular,...
This paper presents an improvement of electrical programmable fuse with dielectric film. By inserting a dielectric film as cap layer combined with self-align silicide block (SAB) process, the program current margin has been extended. This macro has lower program voltage at 2.3V for 8.5μs and can be successfully read out with proper sensing amplifier design.
In this paper a novel and simple CMOS integrated interface is presented. The circuit is suitable for typical gas sensor applications being able to reveal: a) high resistive values over a wide-range (more than five orders of magnitude, ranging from hundreds of kilohm up to tens of gigohm); b) relatively low value capacitances (few picofarad) and their variations. The proposed front-end utilizes, as...
This paper presents a robust gas identification technique for tin oxide (SnO2) gas sensors. The proposed technique generates a unique spike pattern or signature for each sensed gas, irrespective of its concentration. The proposed gas identification technique is insensitive to drift in the sensor baseline resistance. Furthermore, its calibration requires a single measurement to be made for each targeted...
A fold-back current-limit circuit, with load-insensitive quiescent current characteristic for CMOS low dropout regulator (LDO), is proposed in this paper. This method has been designed in 0.35 mum CMOS technology and verified by Hspice simulation. The quiescent current of the LDO is 5.7 mA at 100-mA load condition. It is only 2.2% more than it in no-load condition, 5.58 mA. The maximum current limit...
In this paper, design and characterization of a 18 V switched-capacitor CMOS interface circuit for the closed-loop operation of a capacitive accelerometer is presented. The pendulous silicon accelerometer operates in atmosphere pressure and is designed for non-peaking (low-Q) response with a sensitivity of 0.5 pF/g without vacuum packaging. Test results shows that a full scale acceleration of plusmn15...
This paper presents a 4times4 tin oxide gas sensor array based on spike sequence matching. This integrated CMOS compatible gas identification system generates a unique spike sequence, which is only function of the sensed gas. In contrast to previously reported gas classification schemes, the proposed signature is independent of gas concentration. Reported experimental results validate the functionality...
A resistance deviation-to-time interval converter is presented for interfacing resistive sensors. It consists of two voltage-sources, a ramp integrator, a pair of comparator, and two logic gates. The proposed converter was designed and built on 0.35 mum CMOS process. The prototype circuit exhibits a resolution as high as 13 bits, a linearity error less than plusmn 0.1%, and environment-independent...
This paper introduces a novel current sense amplifier (CSA) in sub-32nm fully depleted (FD) double-gate (DG) silicon-on-insulator (SOI) technology with planar independent self-aligned gates. A new architecture is proposed which takes advantage of the back gate in order to improve circuit properties. Compared to the reference circuit, the new architecture proves to be faster (21% sensing delay decrease),...
Linear motion and out-of-focus blur often coexist in a surveillance system, which degrade the quality of acquired images and thus complicate the task of object recognition and event detection. In this work, we present a point spread function-based (PSF-based) approach considering fundamental characteristics of linear motion and out-of-focus blur based on geometric optics to restore coexisting motion...
An integrated CMOS current-sensing circuit suitable for current-sensing of boost converters is presented in this paper. The simulation results verify the validity and the current-sensing accuracy of the proposed circuit. For the purpose of power saving, the supply voltage of the proposed circuit can be reduced by varying the device parameters.
In deep submicron era, to prevent larger amount of SRAM from more frequently encountered overheating problems and react accordingly for each possible hotspots, multiple ideal run-time temperature sensors must be closely located and response rapidly to secure system reliability while maintaining core frequency. This paper presented a method to extract run-time temperature information from multiple...
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