Carlos A. De La Cruz‐Blas
YOU?
Author Swipe
View article: Power converter for ultra low-frequency and low-voltage energy harvesters
Power converter for ultra low-frequency and low-voltage energy harvesters Open
Energy conversion mechanisms present in some harvesters are only able to provide very low voltage (mV) and frequency (few Hz) electrical signals, which may also have a bipolar nature (AC). These characteristics make unusable most conventio…
View article: Electromagnetic vibrational harvester based on U-shaped ferromagnetic cantilever: A novel two-magnet configuration
Electromagnetic vibrational harvester based on U-shaped ferromagnetic cantilever: A novel two-magnet configuration Open
Electromagnetic vibrational harvesters are low-cost devices featuring high-power densities and robust structures, often used for capturing the energy of environmental vibrations (civil infrastructures, transportation, human motion, etc.,).…
View article: 0.6‐V CMOS bulk‐driven instrumentation amplifier for IoMT bioimpedance analysis
0.6‐V CMOS bulk‐driven instrumentation amplifier for IoMT bioimpedance analysis Open
An instrumentation amplifier (IA), aimed at wideband bioimpedance analysis in the low‐voltage low‐power scenario of internet of medical things (IoMT), is presented. The operation principle is based on the indirect current feedback techniqu…
View article: Very‐low frequency capacitively coupled AC amplifier with a current feedback operational amplifier
Very‐low frequency capacitively coupled AC amplifier with a current feedback operational amplifier Open
Summary In this paper, we propose the idea of using transimpedance amplifiers, in lieu of operational amplifiers (OAs) or transconductance amplifiers (OTAs) to design capacitively coupled AC amplifiers. The idea is demonstrated with a curr…
View article: Power-Efficient Single-Stage Class-AB OTA Based on Non-Linear Nested Current Mirrors
Power-Efficient Single-Stage Class-AB OTA Based on Non-Linear Nested Current Mirrors Open
A novel approach to design low-power area-efficient
\nrail-to-rail output single-stage class-AB operational transconductance amplifiers (OTAs) with enhanced large- and small-signal
\nperformance to drive large capacitive loads is presented…
View article: 0.6-V 1.65-μW Second-Order Gm-C Bandpass Filter for Multi-Frequency Bioimpedance Analysis Based on a Bootstrapped Bulk-Driven Voltage Buffer
0.6-V 1.65-μW Second-Order Gm-C Bandpass Filter for Multi-Frequency Bioimpedance Analysis Based on a Bootstrapped Bulk-Driven Voltage Buffer Open
A bootstrapping technique used to increase the intrinsic voltage gain of a bulk-driven MOS transistor is described in this paper. The proposed circuit incorporates a capacitor and a cutoff transistor to be connected to the gate terminal of…
View article: Single-Stage Class-AB Non-Linear Current Mirror OTA
Single-Stage Class-AB Non-Linear Current Mirror OTA Open
The analysis, design and experimental characterization of a single-stage class-AB operational transconductance amplifier (OTA) with enhanced large- and small-signal performance is presented. The OTA is biased in weak inversion to save powe…
View article: AC coupled amplifier with a resistance multiplier technique for ultra-low frequency operation
AC coupled amplifier with a resistance multiplier technique for ultra-low frequency operation Open
This paper proposes a novel, tunable AC coupled capacitive feedback amplifier, exhibiting an ultra-low high pass corner frequency. This is accomplished by actively boosting the output resistive value of a MOS transistor in weak inversion. …
View article: Fault Detection of Planetary Gears Based on Signal Space Constellations
Fault Detection of Planetary Gears Based on Signal Space Constellations Open
A new method to process the vibration signal acquired by an accelerometer placed in a planetary gearbox housing is proposed, which is useful to detect potential faults. The method is based on the phenomenological model and consists of the …
View article: A family of AC amplifiers for ultra‐low frequency operation
A family of AC amplifiers for ultra‐low frequency operation Open
A family of capacitively coupled alternating current (AC) amplifiers featuring ultra‐low (below 1 Hz) corner frequency is presented. This is achieved by using high‐gain devices which actively boost feedback resistance and thus reduce corne…
View article: Gain-Boosted Super Class AB OTAs Based on Nested Local Feedback
Gain-Boosted Super Class AB OTAs Based on Nested Local Feedback Open
A new approach to design super class AB operational transcon-ductance amplifiers (OTAs) with enhanced large-signal and small-signal performance is presented. It is based on employing two nested positive and negative feedback loops at the a…
View article: AC amplifiers with ultra‐low corner frequency by using bootstrapping
AC amplifiers with ultra‐low corner frequency by using bootstrapping Open
A novel architecture for an AC (i.e. high‐pass) amplifier is proposed allowing a drastic reduction of the cutoff frequency to the sub‐Hertz range. It builds upon the classic AC configuration with a high gain amplifier and a parallel RC cir…
View article: Wide-Swing Class AB Regulated Cascode Current Mirror
Wide-Swing Class AB Regulated Cascode Current Mirror Open
A micropower regulated cascode CMOS current mirror is presented, combining floating gate and quasi floating gate MOS transistors to achieve both wide swing and class AB operation, respectively. Measurement results for a 0.5 μm CMOS test ch…
View article: Low Power CMOS Chopper Preamplifier Based on Source-Degeneration Transconductors
Low Power CMOS Chopper Preamplifier Based on Source-Degeneration Transconductors Open
This paper describes the design of a low-power, low-noise flicker CMOS chopper preamplifier for sensor signal conditioning. The core amplifier and the Gm-C output low pass filter of the proposed fully differential preamplifier are based on…
View article: Low-Power Ultrasonic Front End for Cargo Container Monitoring
Low-Power Ultrasonic Front End for Cargo Container Monitoring Open
A low-power ultrasonic communication system conceived for cargo container monitoring is presented. Two piezoelectric transducers operating at 40 kHz are used for generating and acquiring an ultrasonic signal through the metallic wall, thus…
View article: A 1.2-V Current-Mode RMS-to-DC Converter Based on a Novel Two-Quadrant Electronically Simulated MOS Translinear Loop
A 1.2-V Current-Mode RMS-to-DC Converter Based on a Novel Two-Quadrant Electronically Simulated MOS Translinear Loop Open
A novel current-mode CMOS RMS-to-DC converter using translinear techniques is introduced. It is based on a squarer/divider cell that is implemented using an electronically simulated loop with a novel biasing scheme that allows its operatio…