Keyword: Capacitors

Briefs: Transportation
This ultracapacitor design is energy- and cost-efficient with measurably less environmental impact.

Hybrid Power Management (HPM) is the integration of diverse, state-of-the-art power...

Briefs: Electronics & Computers
Ultra-Low-Dropout Linear Regulator

A radiation-tolerant, ultra-low-dropout linear regulator can operate between –150 and 150 ºC. Prototype components were demonstrated to be performing well after a total ionizing dose of 1 Mrad (Si). Unlike existing components, the linear regulator developed during this activity is unconditionally stable over...

Briefs: Energy
Ultracapacitor-Based Uninterrupted Power Supply System

The ultracapacitor-based uninterrupted power supply (UPS) system enhances system reliability; reduces life-of-system, maintenance, and downtime costs; and greatly reduces environmental impact when compared to conventional UPS energy storage systems. This design provides power when required...

Briefs: Electronics & Computers
338-GHz Semiconductor Amplifier Module

A 35-nm-gate-length InP, high-electron-mobility transistor (HEMT) with a high-indium-content channel as the key component was developed to produce an MMIC (monolithic microwave integrated circuit) power amplifier. With a shorter gate length than previous transistor generations, it allows for electrons to...

Briefs: Electronics & Computers

Magnetic field response sensors are a class of sensors that are powered via oscillating magnetic fields, and when electrically active,...

Application Briefs: Electronics & Computers

DC is not always DC. When systems are developed to operate on DC power, the DC electrical environment will have noise and may experience other disturbances. This article will explore considerations for generating low...

Briefs: Physical Sciences

Sensors for monitoring surface wear and/or temperature without need for wire connections have been developed. Excitation and interrogation of these sensors are accomplished by means of a...

Briefs: Physical Sciences
Biasable, Balanced, Fundamental Submillimeter Monolithic Membrane Mixer

This device is a biasable, submillimeter-wave, balanced mixer fabricated using JPL’s monolithic membrane process — a simplified version of planar membrane technology. The primary target application is instrumentation used for analysis of atmospheric constituents,...

Briefs: Materials
Supercapacitor Electrolyte Solvents With Liquid Range Below –80 °C

A previous NASA Tech Brief [“Low-Temperature Supercapacitors” (NPO-44386) NASA Tech Briefs, Vol. 32, No 7 (July 2008), page 32] detailed ongoing efforts to develop non-aqueous supercapacitor electrolytes capable of supporting operation at temperatures below commercially...

Briefs: Electronics & Computers

A small, segmented microstrip patch antenna integrated with an X-band feedback oscillator on a high- permittivity substrate has been built and tested (see Figure 1). The oscillator antenna is powered by...

Briefs: Electronics & Computers

Electrically variable or programmable capacitors based on the unique properties of thin perovskite films are undergoing development. These capacitors show promise of overcoming two...

Briefs: Mechanical & Fluid Systems

Thin-layered structures containing arrays of micromachined horns, denoted solid micro-horn arrays (SMIHAs), have been conceived as improved means of matching acoustic impedances between...

Briefs: Physical Sciences
Dual Cryogenic Capacitive Density Sensor

A dual cryogenic capacitive density sensor has been developed. The device contains capacitive sensors that monitor two-phase cryogenic flow density to within ±1% accuracy, which, if temperature were known, could be used to determine the ratio of liquid to gas in the line. Two of these density sensors,...

Briefs: Physical Sciences
Wide-Range Temperature Sensors With High-Level Pulse Train Output

Two types of temperature sensors have been developed for wide-range temperature applications. The two sensors measure temperature in the range of –190 to +200 °C and utilize a thin-film platinum RTD (resistance temperature detector) as the temperature-sensing element. Other...

Briefs: Electronics & Computers

A method of encoding and reading numbers incorporates some of the features of conventional optical bar coding and radio-frequency identification (RFID) tagging, but overcomes some of...

Briefs: Materials
Room-Temperature Ionic Liquids for Electrochemical Capacitors

A document discusses room-temperature ionic liquids (RTILs) used as electrolytes in carbon-nanotube-based, electrochemical, double-layer capacitors. Unlike the previous electrolyte (EtNB4 in acetonitrile), the RTIL used here does not produce cyanide upon thermal decomposition and does...

Briefs: Physical Sciences

Magnetic-field-response sensors have been developed for use in measuring levels of fluids under extreme conditions. The sensors work without wire connections or direct physical contact with...

Briefs: Mechanical & Fluid Systems
Parallel Hybrid Vehicle Optimal Storage System

A paper reports the results of a Hybrid Diesel Vehicle Project focused on a parallel hybrid configuration suitable for diesel-powered, medium-sized, commercial vehicles commonly used for parcel delivery and shuttle buses, as the missions of these types of vehicles require frequent stops. During...

Briefs: Physical Sciences

An improved generic design has been devised for implementing signal chains involved in readout from complementary metal oxide/semiconductor (CMOS) image sensors and for other readout...

Briefs: Physical Sciences

An apparatus has been developed for measuring the low concentrations of liquid water and ice in relatively dry soil samples. Designed as a prototype of instruments for measuring the...

Briefs: Semiconductors & ICs

To increase the usefulness of monolithic millimeter-wave integrated circuit (MMIC) components at submillimeter-wave frequencies, a chip has been designed that...

Briefs: Electronics & Computers

The shapes of waveforms generated by commercially available analytical separation devices, such as some types of mass spectrometers and differential mobility spectrometers are, in general,...

Briefs: Electronics & Computers

A proposed torque sensor would be capable of operating over the temperature range from 1 to 400 K, whereas a typical commercially available torque sensor is limited to the narrower temperature...

Briefs: Semiconductors & ICs

Figure 1 depicts a monolithic microwave integrated-circuit (MMIC) single-stage amplifier containing an InP-based high- electron-mobility transistor (HEMT) plus coplanar-waveguide (CPW)...

Briefs: Semiconductors & ICs

An effort to extend the low-temperature operational limit of supercapacitors is currently underway. At present, commercially available non-aqueous supercapacitors are rated for a minimum operating temperature...

Briefs: Electronics & Computers

An improved self-validating thermocouple (SVT) instrumentation system not only acquires readings from a thermocouple but is also capable of detecting deterioration and a variety of discrete...

Briefs: Mechanical & Fluid Systems

A method denoted wireless acoustic- electric feedthrough (WAEF) has been conceived for transmitting power and/or data signals through walls or other solid objects made of a variety...

Briefs: Medical

Telemetry systems of a type that have been proposed for the monitoring of physiological functions in humans would include the following subsystems:

Surgically implanted...

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