Aplicações eletroanalíticas com eletrodos de prata confeccionados a partir de CDs graváveis

This paper presents a new way for the construction of silver electrodes utilizing recordable CDs. The new electrodes were explored for the quantification of chloride (by potentiometry/FIA), cyanide (by amperometry/FIA) and for lead analysis (by square wave voltammetry). For the flowing measurements, a digital multimeter, connected to a microcomputer (via RS 232 interface) was used to collect directly the potential signal (for Cl- measurements) or to take the output signal from a potentiostat (for CN- measurements). The square wave voltammetry analysis was performed in a commercial instrument. The results shown good performance of the new electrodes and the detection limit (s/n = 3) attained for these three analytes were: 0.2, 50, and 200 µg L-1 for Pb2+, Cl-, and CN- respectively.

Implementation of a VLSI amplifier interfaced with biomedical sensors for ultra wide band data transmission

This thesis presents a CMOS Amplifier with High Common Mode rejection designed in UMC 130nm technology. The goal is to achieve a high amplification factor for a wide range of biological signals (with frequencies in the range of 10Hz-1KHz) and to reject the common-mode noise signal. It is here presented a Data Acquisition System, composed of a Delta-Sigma-like Modulator and an antenna, that is the core of a portable low-complexity radio system; the amplifier is designed in order to interface the data acquisition system with a sensor that acquires the electrical signal. The Modulator asynchronously acquires and samples human muscle activity, by sending a Quasi-Digital pattern that encodes the acquired signal. There is only a minor loss of information translating the muscle activity using this pattern, compared to an encoding technique which uses astandard digital signal via Impulse-Radio Ultra-Wide Band (IR-UWB). The biological signals, needed for Electromyographic analysis, have an amplitude of 10-100μV and need to be highly amplified and separated from the overwhelming 50mV common mode noise signal. Various tests of the firmness of the concept are presented, as well the proof that the design works even with different sensors, such as Radiation measurement for Dosimetry studies.

Electronic multimeter TS-505/U.

"June 1951."

Operator, organizational, direct support and general support maintenance manual : periodic tests using calibator standard, digital multimeter, and calibration test set, Improved Hawk Air Defense Guided Missile System.

"Reprint which includes current pages from changes 1 through 3."

Operator, organizational, DS and GS maintenance manual : differential multimeter, 6625-489-8908 (TOW heavy antitank/assault weapon system).

Includes bibliographical references.

Multimeter TS-297/U.

"July 1955."

Operator's manual for multimeter TS-352B/U (NSN 6625-00-553-0142).

"12 November 1976."

Organizational, direct support, and general support maintenance repair parts and special tools lists (including depot maintenance repair parts and special tools) for multimeter TS-352B/U (NSN 6625-00-553-0142).

"December 1976."

Organizational, field, and depot maintenance manual : multimeter AN/PSM-6, AN/PSM-6A, part no. 56-5002A, 56-5002B, 165-5002, federal stock no. 6625-642-1686, 6625-643-1686, 6625-656-5871, (Bruno).

"July 1962."

Operation and organizational maintenance : multimeter AN/URM-105, including multimeter ME-77/U.

"June 1959."

Operator's, organizational, direct support, and general support maintenance repair parts and special tools list (including depot maintenance repair parts and special tools list) for multimeter AN/USM-223.

"September 1974."

Operator's, organizational, direct support, general support, and depot maintenance manual : multimeter ME-333/U (NSN 6625-00-935-1425) and J-omega volt-ohmmeter types 213A, 215A, and 219A.

"December 1970."

Organizational, direct support and general support maintenance repair parts and special tools list : multimeter, digital AN/PSM-45, (6625-01-139-2512).

Includes index.

Operator's, organizational, direct support, and general support maintenance manual : multimeter, digital, AN/PSM-45, (NSN 6625-01-139-2512).

"10 January 1984."