Patent ID: 6016077
Filing Date: 2000-01-18
Classification: H03F

Abstract:
Circuitry for amplifying electrical signals comprising:input circuitry adapted to receive an electrical signal;an amplification circuit for amplifying said electrical signal coupled to said input circuitry, and adapted to output an amplified electrical signal;a user switchable circuit coupled to said amplification circuit, and adapted to selectively modify a capacitive load within said amplification circuit;a switch input;a switching element responsively coupled to said switch input; anda capacitive element operatively coupled to said switching element and to said amplification circuit;wherein said switching element is a MOSFET, said capacitive element is a capacitor, the gate of said MOSFET is coupled to said switch input, the MOSFET is operatively coupled between a first side of said differential amplifier and said capacitor, and said capacitor is operatively coupled between said MOSFET and a second side of said differential amplifier.