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David Steven Ripley, William T Waldie: Integrated image reject mixer. Motorola, Sylvia Chen, February 9, 1999: US05870670 (120 worldwide citation)

An integrated image reject mixer (150) generates precise quadrature components using highly matched local-oscillator (LO) path and intermediate frequency (IF) path resistor-capacitor (RC) phase shifting networks (131, 138). Because the LO signal from a local oscillator (127) has a constant amplitude ...


2
Jin D Kim, William T Waldie: Surface-mount filter. Motorola, Rolland R Hackbart, June 11, 1991: US05023580 (13 worldwide citation)

A filter assembly (100) includes a ceramic block filter (102) and shielding bracket (132) which surface mounts to a printed circuit board (152) for interconnecting to radio frequency devices, such as a radio transceiver. The bracket (132) is soldered to the filter (102) and includes two openings (13 ...


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William T Waldie, Joseph P Heck: Radio having a combined PLL and AFC loop and method of operating same. Motorola, Kevin D Kaschke, May 13, 1997: US05630215 (5 worldwide citation)

A radio (100) has a combined phase locked loop (PLL) (207) and an automatic frequency control (AFC) loop (215, 109, 111) and a method of operating the same. A mixer (201) converts the received RF signal (117) to an intermediate frequency (IF) signal (219) responsive to an injection signal (217). The ...


5
Lawrence E Connell, David P Kovac, Poojan A Wagh, Vikram B Karnani, William T Waldie, Tao Wu: Higher linearity passive mixer. Freescale Semiconductor, Brinks Hofer Gilson & Lione, July 6, 2010: US07751792 (3 worldwide citation)

Transmission of a high frequency signal is provided by a passive mixer. The passive mixer receives a low frequency signal as an input. The passive mixer includes a plurality of transistors each with a gate, a source, and a drain. The passive mixer also includes a local oscillator connected to the ga ...


6
Lawrence E Connell, David P Kovac, Poojan A Wagh, Vikram B Karnani, William T Waldie, Tao Wu: Higher linearity passive mixer. Freescale Semiconductor, Brinks Hofer Gilson & Lione, Freescale, September 28, 2006: US20060217101-A1

Transmission of a high frequency signal is provided by a passive mixer. The passive mixer receives a low frequency signal as an input. The passive mixer includes a plurality of transistors each with a gate, a source, and a drain. The passive mixer also includes a local oscillator connected to the ga ...



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