HF mixer stage in common base

Abstract

Abstract In a common-base RF mixer stage having: a) two bipolar amplifier transistors (T1, T2), b) two switching stages (1, 2) which are in each case allocated to one amplifier transistor and in each case have two emitter-coupled bipolar switching transistors (T3, T4, T5, T6) and with two signal sources (S1, S2) which apply heterodyne signals to the bases of the switching transistors, c) two nodes (K1, K2) at which the emitters of the switching transistors are in each case connected to the collector of the associated amplifier transistor, d) two further nodes (K3, K4), at which the collectors of two switching transistors of different switching stages are in each case connected to one another, e) circuit means (C1, C2, TR) for potential isolation, via which the emitters of the amplifier transistors are connected to one another, f) an input signal source with associated internal impedence, one terminal of which is connected to the circuit means for potential isolation via the circuit input and the other terminal of which is connected to reference potential and the signal of which is to be transposed to a different frequency range by the mixer stage, g) the amplifier transistors are of different type of conductivity, h) the two switching transistors of one switching stage are of the same type of conductivity as the associated amplifier transistor. <IMAGE>

Inventors

• 👤 Hans Dr. Sapotta
• 👤 Heinz Rinderle

Bibliographic Details