METHOD AND DEVICE FOR MODULATING PHASE AND AMPLITUDE OF MULTIPLE-FREQUENCY SIGNALS Russian patent published in 2006 - IPC H03C3/00 

FIELD: radio communications; generation of phase-, amplitude-, and phase/amplitude-keyed signals.

SUBSTANCE: novelty is that keyer is divided into controlled and uncontrolled parts which are inserted between signal source and load; uncontrolled part of keyer is built of definitely interconnected two-terminal networks, each of the latter being assembled of desired quantity of reactive components whose parameters are chosen with a view to afford double-layer variation of signal amplitude and phase at fixed frequencies; desired frequency responses are interpolated in case of changes in impedances of keyer controlled part from one state to other under action of low-frequency double-layer control voltage or current; number of fixed frequencies is chosen arbitrarily; signal source and load impedances are chosen arbitrarily; number of two-terminal networks chosen for the purpose is two; quantity of reactive components forming uncontrolled-part two-terminal networks and ratings of their parameters are chosen to ensure different desired mechanisms of through signal amplitude and phase variations at chosen number of fixed frequencies.

EFFECT: provision for desired mechanisms of through signal amplitude and phase variations at desired number of fixed frequencies with keyer inserted between arbitrary resistors.

2 cl, 5 dwg