Amplifying circuit particularly adapted for amplifying a biopotential input signal
First Claim
1. An amplifying circuit for amplifying an input signal from a source, comprising:
- an insulating housing having a conductive input contact mounted thereon and adapted to engage said source with said input signal applied to said contact;
a lead amplifier having an input coupled to said input contact and an output; and
a voltage driven first shield connected to said output of said lead amplifier and surrounding portions of said input contact not in engagement with said source;
wherein said lead amplifier circuit comprises;
an operational amplifier having inverting and non-inverting inputs,first and second diodes connected in parallel inverse polarity across the inputs of said operational amplifer,third and fourth diodes connected in parallel inverse polarity from the inverting input of said operational amplifier to a circuit common potential, andan output resistor connected from the inverting input to the output of said operational amplifier.
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Accused Products
Abstract
An amplifying circuit for amplifying a bipotential input signal, including an insulating housing having a conductive input contact mounted on the housing and adapted to engage a human body so that the bipotential input signal applied to the contact; a lead amplifier having inverting and non-inverting inputs, one of which is coupled to the input contact, and an output; first and second diodes connected in parallel inverse polarity across the inputs of the lead amplifier; third and fourth diodes connected in parallel inverse polarity from the inverting input of the lead amplifier to a circuit common potential; and an output resistor connected from the inverting input to the output of the lead amplifier. Portions of the input contact are surrounded by a voltage drive shield connected to the output of the lead amplifier.
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Citations
19 Claims
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1. An amplifying circuit for amplifying an input signal from a source, comprising:
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an insulating housing having a conductive input contact mounted thereon and adapted to engage said source with said input signal applied to said contact; a lead amplifier having an input coupled to said input contact and an output; and a voltage driven first shield connected to said output of said lead amplifier and surrounding portions of said input contact not in engagement with said source; wherein said lead amplifier circuit comprises; an operational amplifier having inverting and non-inverting inputs, first and second diodes connected in parallel inverse polarity across the inputs of said operational amplifer, third and fourth diodes connected in parallel inverse polarity from the inverting input of said operational amplifier to a circuit common potential, and an output resistor connected from the inverting input to the output of said operational amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An amplifying circuit for amplifying an input signal from a source, comprising:
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an insulating housing having a conductive input contact mounted on said housing and adapted to engage said source with said input signal applied to said contact; a lead amplifier having inverting and non-inverting inputs, one of which is coupled to said input contact, and an output; first and second diodes connected in parallel inverse polarity across the inputs of said lead amplifier; third and fourth diodes connected in parallel inverse polarity from the inverting input of said lead amplifier to a circuit common potential; and an output resistor connected from the inverting input to the output of said lead amplifier. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification