Generation of phase-displaced triangular signals which may be two-phase and three-phase, and of corresponding sinusoidal signals

Claim 2

Generation of a triangular signal phase-displaced by an angle phi *, of frequency f and peak-to-peak amplitude Ao, employing a triangular signal E of frequency f and amplitude Ao, a continuous voltage Ao equal to said amplitude and a continuous voltage Vo specified by: Vo Ao phi * / pi and the desired phase-displaced signal being obtained by taking, during the rising slope or interval 0 < OR = phi < OR = pi of the signal E, the larger in algebraic value of the two signals (Vo+E) and (-Ao+Vo-E), and taking during the downward slope or interval pi < OR = phi < OR = 2 pi of the signal E, the smaller in algebraic value of the two signals +Vo+E and (+Ao-VoE).

Claim 3

Generation of a triangular signal phase-displaced by phi * and of a triangular signal phase-displaced by - phi * as claimed in claim 1, employing an oscillator supplying the said triangular signal E and the corresponding rectangular signal C, an adjustable polarizing element supplying the said voltage Vo, an operational amplifier receiving at its positive input the said signal E and on its negative input the said voltage Vo and supplying at its output the signal (-Vo+E), a second polarizing element supplying the said voltage -Ao, a second operational amplifier receiving at its positive input the said voltage -Ao and on its negative input the signal (-Vo+E) and supplying at the output the signal (-Ao+Vo-E), a diode receiving on its anode the signal (-Vo+E), a second diode receiving on its anode the signal (-Ao+Vo-E), the cathodes of the two diodes being connected together and to one extremity of a resistance connected to a source of negative voltage, a summation device receiving on its input the signal E and on an input the signal Vo and supplying at its output the signal (+Vo+E), a third operational amplifier receiving on its positive input the signal (+Vo+E), connected to earth at its negative input and supplying at its output the signal (Vo+E), a third polarizing element supplying the said voltage Ao, a fourth operational amplifier receiving on its positive input the said voltage Ao and on its negative input the signal (+Vo+E) and supplying at its output the signal (+Ao-Vo-E), a third diode receiving on its cathode the signal (+Vo+E), a fourth diode receiving on its cathode the signal (+Ao-Vo-E), the anodes of the two diodes being connected together and to one extremity of a resistance coupled to a positive voltage, a solid double reversing device controlled by the said signal E and connected by its inputs to the cathodes of the first and second diodes and to the anodes of the third and fourth diodes and two operational amplifiers, the input of each amplifier being connected to an output of the reversing device, the two triangular signals phase-displaced by and - phi *being then obtained at the outputs of the said amplifiers.