Three-state digital mixer-driver circuit,申请号US19820418494-传众专利搜索

Three-state digital mixer-driver circuit

申请公布号：US4468784(A)

申请号：US19820418494

申请日期：1982.09.15

申请公布日期：1984.08.28

申请人：

ROCKWELL INTERNATIONAL CORPORATION

发明人：JAGNOW, PAUL G.;VAIL, DAVID K.

分类号：H04B1/707;(IPC1-7):H04B1/10

主分类号：H04B1/707

摘要：A mixer-driver circuit in a code correlator of a spread-spectrum communications system simultaneously multiplies an input RF signal with two phase-offset digitally encoded bit streams. A double-balanced mixer is driven with the difference of the digital signals; the mixer is either inverting, noninverting, or off. Matched ECL bistables which reclock the phase-offset bit streams, and a load current steering circuit coupled to the bistables together provide a balanced, differential drive current to the mixer which switches state faster than the bistables alone. In another embodiment, a single bistable receiving an encoded bit stream differentially drives the mixer in a biphase circuit.