Patent Document ID: 4063196
Application ID: 05741321
Patent Flag: 1

Claim One:
1. A frequency modulation oscillator for encoding data having at least three primary frequencies and comprising at least three input amplifiers, switch means associated with each of said input amplifiers for activating said associated amplifier in response to an input control signal, a plurality of feedback amplifiers, one of said feedback amplifiers being associated with each of said input amplifiers and having an output, the inputs of all of said feedback amplifiers being connected in common to an input signal comprised of the electrical summation of signals from each of said input amplifiers, a plurality of feedback means, one feedback means being connected between the output of each feedback amplifier and an input of the associated input amplifier and having an electrical characteristic such that said input amplifier acts as an oscillator at a predetermined primary frequency when activated, the output of said frequency modulation oscillator being comprised of a signal which is the electrical sum of output signals from all of said input amplifiers and having the characteristic of being an oscillating signal at the primary frequency of an activated input amplifier when only one of said amplifiers is activated and having the further characteristic of consisting of a continuous frequency oscillating signal shifting from a first primary frequency to a second primary frequency when a first input amplifier is smoothly deactivated as a second input amplifier is essentially simultaneously smoothly activated.