Orthogonal signal generation system

Details Orthogonal signal generation system Orthogonal signal generation system

1994-09-09

1997-07-22

Nguyen, Matthew V.

Electricity: power supply or regulation systems

For phase shift or control

Using a three or more terminal semiconductive device

323218, G05F 300

Patent

active

056507143

ABSTRACT:
A local signal of preset frequency is supplied to an input terminal of a signal input section. The local signal is supplied to a control input terminal of a variable current source, a current corresponding to the local signal is output from the variable current source, and the current is supplied to a phase shifting section. The phase shifting section includes an integrator constructed by a capacitor and a resistor connected in series and a differentiator constructed by a resistor and a capacitor connected in parallel. As parallely connecting the phase shifting circuit with a linear element of which the signal input section consists, the phase shifting section outputs first and second output signals which has the same frequency as the local signal and whose phases are different from each other by 90.degree.. The output signals of the phase shifting section are output to the next stage via an orthogonal signal output section constructed by current source and transistors.

REFERENCES:
patent: 3568045 (1971-03-01), Yorke
patent: 3694567 (1972-09-01), Kresock
patent: 4725767 (1988-02-01), Mori
patent: 4737703 (1988-04-01), Hayakawa
patent: 5043654 (1991-08-01), Philippe

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