A GAIN CONTROLLABLE AMPLIFIER, A RECEIVER COMPRISIA GAIN CONTROLLABLE AMPLIFIER, A RECEIVER COMPRISING A GAIN-CONTROLLABLE AMPLIFIER, AND A METHOD OF NG A GAIN-CONTROLLABLE AMPLIFIER, AND A METHOD OF CONTROLLING SIGNAL AMPLITUDES CONTROLLING SIGNAL AMPLITUDES

摘要

A gain controllable amplifier having stable HF and DC characteristics as well as a receiver having low noise and low distortion are described. These functional units comprise at least one transadmittance stage having differential transistor pairs coupled in parallel. Gain control is effectuated by varying the unbalance in the differential transistor pairs.