A low distortion wide band CMOS direct digital RF amplitude modulator
Author
Summary, in English
This paper describes a low distortion wide band CMOS direct digital RF amplitude modulator, which uses a 10-bit linear interpolation current steering digital to analog converter (DAC) and a Gilbert cell based mixer to generate an amplitude modulated RF signal directly. The linear interpolation increases the attenuation of the DAC's image components. The low pass filter (LPF) is therefore eliminated, and the RF transmitter structure is simplified. This modulator is suitable for system-on-chip design. The chip has been fabricated in a 0.35 μm, 3.3 V digital CMOS process. When the transmission signal is at 3 MHz, the distortion components are below -54 dBc at 800 MHz and -49 dBc at 1.2 GHz, respectively. The image signals are below -45 dBc when the transmission signal is 5.2 MHz
Publishing year
2002
Language
English
Pages
775-778
Publication/Series
ESSCIRC 2002. Proceedings of the 28th European Solid-State Circuit Conference
Document type
Conference paper
Publisher
Univ. Bologna
Topic
- Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- amplitude modulated RF signal
- DAC image components
- low pass filter elimination
- system-on-chip design suitability
- digital CMOS process
- distortion components
- transmission signal
- image signals
- RF transmitter structure
- 3.3 V
- 0.35 micron
- 1.2 GHz
- 3 MHz
- 800 MHz
- 5.2 MHz
- Gilbert cell based mixer
- low distortion wide band CMOS direct digital RF amplitude modulator
- linear interpolation current steering digital to analog converter
Conference name
ESSCIRC 2002. Proceedings of the 28th European Solid-State Circuit Conference
Conference date
2002-09-24 - 2002-09-26
Conference place
Firenze, Italy
Status
Published
ISBN/ISSN/Other
- ISBN: 88-900847-9-0