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US 2003/0194100 A1Published application
Microphone input buffer biasing circuit
AssigneeKnowles Electronics, LLC
InventorSteven E. Boor
Life of this patent
Estimating the term…
Abstract
An input biasing circuit for a microphone is disclosed. The circuit includes an input and an output. An input transistor is connected between the input and the output and to a biasing circuit. The biasing circuit DC biases the gate terminal of the input transistor. A resistor operably connected to, and cooperating with the input transistor, provides a buffered version of a received microphone transducer signal to the output.
Claims13
An input buffer circuit for a microphone, the input buffer circuit comprising:
- an input for receiving a voltage signal;
- an input transistor being operably connected between the input and an output;
- a biasing circuit being operably connected to the input and the input transistor, the biasing circuit for DC biasing the gate terminal of the input transistor;
- and,
- a resistor being operably connected to the input transistor and the output, the resistor and the input transistor cooperating to provide a buffered voltage signal to the output.
2 more elements
An input buffer circuit for a microphone, the input buffer circuit comprising:
- an input for receiving a transducer signal;
- an input transistor being operably connected between the input and an output;
- means for biasing the gate terminal of the input transistor;
- and,
- a resistor being operably connected to the input transistor and the output, the resistor and the input transistor cooperating to provide a buffered transducer signal to the output.
2 more elements
Dependencies are inferred from the claim text.