| 摘要 |
<p>A phase shifting electric circuit (1) comprises units for conveying an input signal (V1) from a main signal input (12) to a main signal output (11). The circuit (1) has a first signal path (18), from the input (12) to the output (11), along which a connectable and disconnectable first active unit (3) is arranged and also a second signal path (19) along which a connectable and disconnectable second active unit (4) and a 180 degree phase shifting unit (2) are arranged. By a method, a selection is made which of the active units (3, 4) is to be in a connected condition after which control signals (U1, U2) to the units (3, 4) sets them in a connected and disconnected condition respectively with the outcome of a transmission from the output (11), depending on the selection, either a non-phase shifted signal (V1') or a 180 degree phase shifted signal (V2'). Depending on the function of the active units, (3, 4) the signal (V1', V2') can also be affected in other respects than its relative phase.</p> |
