H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/107
H03K 3/023 (2006.01) H03B 21/00 (2006.01)
Patent
CA 1213945
ABSTRACT OF THE DISCLOSURE There is provided a sum or differential frequency signal generating circuit for two input signals of first and second frequencies. This circuit comprises: 1st and 2nd differential amplifiers which receive the input signal of the 1st frequency and generate differential 1st and 2nd output currents having the phase difference of 90°; 3rd and 4th differential amplifiers which receive the input signal of the 2nd frequency and generate differential 3rd and 4th output currents having a phase difference of 90°; a 1st multiplier consisting of a differential amplifier for generating the multipli- cation output current of the output currents of the 1st and 3rd differential amplifiers; a 2nd multiplier consist- ing of a differential amplifier for generating the multiplication output current of the output currents of the 2nd and 4th differential amplifiers; and an output terminal at which the output currents of the 1st and 2nd multipliers are synthesized and fetched. This signal generating circuit does not need an adjusting circuit but can suppress unnecessary signal components and is suitable for making an IC and can be applied to an SSB modulator and other similar circuits.
447030
Gowling Lafleur Henderson Llp
Sony Corporation
LandOfFree
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