A new integrable composite circuit with improved FET-like characteristics
A new composite circuit comprising five active devices (a JFET and four bipolar transistors) and three passive resistors is described and shown to exhibit FET-like characteristics with much improvement in thermal stability and transfer curve linearity over a wide range of input bipolar voltage. The input resistance of the proposed circuit is, however, equal to that of the FET with the additional advantage that it continues to be high even for positive input voltage. The proposed structure is fully compatible with silicon integrated circuit (IC) technology and may thus be commercially mass-produced as a three-terminal device with its terminals designated as gate, drain, and source.
Novel BIFET composite unit and its applications
A new integrable BIFET composite unit comprising two BJTs, one JFET and one passive resistor is described and as a unit shown to exhibit FET-like characteristics with much improvement in thermal stability and transfer curve linearity over a wide range of input bipolar voltage and temperature variations. The forward transfer admittance of the unit may easily be adjusted over a wide range. Amplifier circuits using the proposed unit are also described.
Silver–Gelatin Method for the Determination of Trace Amounts of Carbon Monoxide in Air
The use of silver–gelatin complex was found suitable for the determination of trace amounts of carbon monoxide in air. Silver–gelatin complex is reduced by carbon monoxide to give intensely colored sol. Measurement of the color intensity of the stable silver sol enables the determination of carbon monoxide successful under various environmental conditions. The detection limit is 2–100 ppm. The relative standard deviation for the determination of 10 ppm carbon monoxide is 2.6%.