Apparatus for measuring biopermeability
First Claim
1. An apparatus for measuring biopermeability comprising:
- a frame;
light emitting means and light receiving means each secured to said frame to face each other while keeping a gap therebetween such that an organism under measurement can be received in said gap without being urged;
preamplifier means connected to said light receiving means;
amplifier means for zero adjustment and gain adjustment connected to an output of said preamplifier means, said amplifier means having an output for outputting data representing biopermeability;
display means for displaying biopermeability data connected between said output of said amplifier means and ground;
wherein said light emitting means is a light emitting diode; and
wherein said preamplifier means is an operational amplifier having two different selectable gains, one of said selectable gains being unity gain and the other 100 times gain;
an AC inverting amplifier circuit connected to said output of said amplifier means, and including a CR coupler and an amplifier having a fixed amplification factor, said AC inverting amplifier circuit having an output for outputting AC data.
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Abstract
An apparatus for measuring biopermeability is disclosed. The apparatus includes a frame, a light source, a light-receiving element, a pre-amplifier, an off-set adjustment amplifier and a DC volt meter. The light source and light-receiving element are secured to the frame such that they face each other while keeping a gap therebetween such that an organism under measurement can be received in the gap without being urged. The pre-amplifier is connected to the light-receiving element and has a gain switching function. The summing amplifier is connected for zero adjustment and gain adjustment to the output side of the pre-amplifier and has an output terminal from which a DC data representing biopermeability is provided. Between the output terminal and ground the DC volt meter is connected.
18 Citations
7 Claims
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1. An apparatus for measuring biopermeability comprising:
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a frame; light emitting means and light receiving means each secured to said frame to face each other while keeping a gap therebetween such that an organism under measurement can be received in said gap without being urged; preamplifier means connected to said light receiving means; amplifier means for zero adjustment and gain adjustment connected to an output of said preamplifier means, said amplifier means having an output for outputting data representing biopermeability; display means for displaying biopermeability data connected between said output of said amplifier means and ground; wherein said light emitting means is a light emitting diode; and wherein said preamplifier means is an operational amplifier having two different selectable gains, one of said selectable gains being unity gain and the other 100 times gain; an AC inverting amplifier circuit connected to said output of said amplifier means, and including a CR coupler and an amplifier having a fixed amplification factor, said AC inverting amplifier circuit having an output for outputting AC data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification