Number | Date | Country | Kind |
---|---|---|---|
6-082292 | Mar 1994 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3273079 | Curtis | Sep 1966 | |
3731217 | Gerst et al. | May 1973 | |
5001492 | Shapiro et al. | Mar 1991 | |
5172077 | Funada | Dec 1992 | |
5227739 | Mandai et al. | Jul 1993 | |
5382925 | Hayashi et al. | Jan 1995 |
Number | Date | Country |
---|---|---|
61-238144 | Oct 1986 | JPX |
2174343 | Jul 1990 | JPX |
4287542 | Oct 1992 | JPX |
5347529 | Dec 1993 | JPX |
Entry |
---|
G. Flower et al., "QPSK Modulators for Digital Cellular Communication", IEEE 1992 Bipolar Circuits and Technology Meeting 3.2, Jul. 10, 1992, pp. 59-62. |
P. Weger et al., "Digital Phase-Shift Quadrature Frontend For Lo-Inputs Up to 6 GHz", Proceedings of 20th European Microwave Conference, Sep. 1990, pp. 424-428. |
K. Yamamoto et al., "A 1.9-GHz-Band GaAs Direct-Quadrature Modulator IC with a Phase Shifter", IEEE Journal of Solid State Circuits, vol. 28, No. 10, Oct. 1993, pp. 994-1000. |