| 摘要 |
A distortion compensated differential circuit. One embodiment of the circuit includes a differential follower stage comprising first (T1) and second (T &upbar& 1) transistors having their respective collectors connected to a supply voltage source (Vcc). The bases of these transistors receive a first (V1) and a second (V2) input signal and their emitters are coupled together by a first impedance (Z) and are further connected to a first (I1) and a second (I &upbar& 1) current source, respectively. The connections between the emitters of the first and the second transistors and the first and the second current sources, respectively, are made via the base-emitter paths of third (T11) and fourth (T12) transistors, respectively. The collectors of the third (T11) and the fourth (T12) transistors are connected to the bases of the fourth (T12) and the third (T11) transistors, respectively. The emitters of the third (T12) and the fourth (T12) transistors are coupled to one another by at least a second impedance (Z') of a nominal value which is less than that of the first impedance.
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