Title :
A stable 250 to 4000 MHz GaAs IQ modulator IC
Author_Institution :
Microwave Technol., Hewlett-Packard Co., Santa Rosa, CA, USA
Abstract :
An in-phase/quadrature (IQ) vector modulator provides the capability to simultaneously modulate the magnitude and phase of a carrier. This versatile modulation capability is widely used in communications systems to generate signals of minimal spectral width. An accurate and broadband IQ modulator is a valuable part of a general-purpose test-signal generator. This 250 to 4000MHz GaAs FET IQ modulator IC uses an RC and a CR network to create quadrature signals.
Keywords :
III-V semiconductors; RC circuits; field effect analogue integrated circuits; gallium arsenide; modulators; quadrature amplitude modulation; signal generators; 250 to 4000 MHz; CR network; IQ modulator IC; RC network; carrier magnitude; carrier phase; general-purpose test-signal generator; in-phase/quadrature vector modulator; minimal spectral width; quadrature signals; Bandwidth; Degradation; FETs; Feedback; Gallium arsenide; Microwave integrated circuits; Phase modulation; Phase shifters; Resistors; Temperature;
Conference_Titel :
Solid-State Circuits Conference, 1997. Digest of Technical Papers. 43rd ISSCC., 1997 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-3721-2
DOI :
10.1109/ISSCC.1997.585426
