ANALOGUE SYSTEM OF GENERATING QUADRATURE SIGNALS

摘要

The invention relates to an analogue system of generating quadrature signals. The inventive system comprises: a) a first analogue frequency divider; and b) a second analogue frequency divider. Each of said dividers is supplied respectively with a d1 and d2 analogue signal having a frequency 2f, said signals (d1 and d2) being 180 DEG phase shifted relative to each other. In this way, two analogue output quadrature signals s1 and s2 having frequency f are obtained at the output of each of the aforementioned frequency dividers, i. e. said signals are 90 DEG phase shifted relative to each other. The aforementioned signals (d1 and d2) are obtained using a differential transformer (1). Moreover, each of the above-mentioned analogue frequency dividers can be formed, from the connection with the end of the auxiliary differential transformer (1), using an inverting transformer (2, 2a), two variable-capacity varactor diodes (3, 4, 3a, 4a), which are connected to the end of each of the windings of the inverting transformer (2, 2a), and a non-inverting transformer (5, 5a).