David E. Clouser - Claymont DE John S. Craven - West Grove PA
Assignee:
Hewlett-Packard Company - Palo Alto CA
International Classification:
G01N 3108
US Classification:
73 231
Abstract:
A thermal conductivity detector in which sample gas and reference gas are made to alternately flow through a thermal conductive cell at a given switching frequency and in which the output signal is applied to a synchronous detector wherein it is mixed with a control wave that is in phase quadrature with the flow component of the output signal.
David E. Clouser - Wilmington DE John S. Craven - West Grove PA
Assignee:
Hewlett-Packard Company - Palo Alto CA
International Classification:
G01N 3108
US Classification:
73 27R
Abstract:
A sample fluid and a reference fluid are alternately applied to a fluid detector and an output signal is derived that is proportional to the difference between the response of the detector to the fluids.
Method For Extending Transistor Logarithmic Conformance
David E. Clouser - Claymont DE Steven J. Engel - West Chester PA
Assignee:
Hewlett-Packard Company - Palo Alto CA
International Classification:
G06G 724
US Classification:
307229
Abstract:
The linear component appearing in the output of two logarithmic amplifiers connected for temperature compensation and having matched feedback semiconductor devices is cancelled in a resistor connected in series with a logarithmic device between the output and a point of reference potential so that a purely logarithmic voltage appears at their junction.
The agency says it hasn't received any reports of disease or illness, but health officials are advising patients of Montoursville dentist Dr. David Clouser to get tested for hepatitis B, hepatitis C and HIV.