Patent ID: 6259312
Filing Date: 2001-07-10
Classification: H03D,H03F

Abstract:
An active component of a radio device, comprising:a first transistor and a second transistor,a differential input with a first input line and a second input line, of which the first input line is coupled to the base of the first transistor and the second input line is coupled to the base of the second transistor, said differential input having an input impedance; anda cross-feedback connection between the first transistor a nd the second transistor, said connection further comprising:a first connection through a first feedback RC circuit from the emitter of said first transistor to the base of said second transistor and a second connection through a second feedback RC circuit from the emitter of said second transistor to the base of said first transistor, wherein the value of said input impedance is directly determined by the characteristics of said cross-feedback connection.