| 摘要 |
<p>The proposed amplifier is intended for use at frequencies of hundreds of MHz, and is applicable to a digital data processing, in particular, Analogue-to-Digital converters. With increasing frequency the matching of differential amplifiers becomes increasingly uneconomical as the component count increases making integrated circuits more difficult to construct. The present amplifier is intended to overcome this problem. A multi-emitter transistor (T3) with n-1 emitter connections for an n level pulse sequence has its base connected to a reference supply (u(t)). One emitter is connected to the collector of the signal (S) input transistor (T4) and to the emitter of one output transistor (T5). The other emitters of the first transistor (T3) are similarly connected (T7,T6). The output transistors (T5,T6) have their bases connected to the level reference voltages (U1,U2). The output (A) is taken from a resistor (RA) connected to the zero volt reference. Switching points are determined by the relative magnitudes of the reference supply (u(t)) and the level references (U1,U2).</p> |
