Abstract
A direct-digital modulation (DIDIMO) transmitter employing 3-taps 10-bit Finite Impulse Response configuration is proposed and evaluated. FIR-DIDIMO provides simultaneous combination of D/A conversion, up-conversion, power control and also quantization noise filtering at arbitrary offset frequency from the carrier. This makes the circuit suitable for multistandard transmitters by eliminating the area-consuming analog baseband low-pass filter. Moreover it enables optimum RF noise shaping against various modes and bands requirement. The noise shape adjustment scheme is also detailed in this paper. Using a WCDMA signal, the transmitter achieves 81dB of power control range, EVM of less than 3% from -42dBm to +6.0dBm output power for band I operation with 568.32MHz sampling frequency. The RX band (190 MHz offset) noise floor achieves -156.3dBc/Hz measured with 291mW analog power consumption at +6.0dBm output. WCDMA band II and LTE 20M band1 performances are also demonstrated. The chip is designed and implemented with a low-power 0.13um 1.5V/3.3V CMOS process and the transmitter analog area measures 1.3mm2.
Original language | Undefined |
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Title of host publication | Proceedings of the European Solid-State Circuit Conference, ESSCIRC 2012 |
Place of Publication | Piscataway |
Publisher | IEEE |
Pages | 53-56 |
Number of pages | 4 |
ISBN (Print) | 978-1-4673-2212-6 |
DOIs | |
Publication status | Published - 17 Sept 2012 |
Event | 38th European Solid-State Circuit Conference, ESSCIRC 2012 - Bordeaux, France Duration: 17 Sept 2012 → 21 Sept 2012 Conference number: 38 |
Publication series
Name | |
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Publisher | IEEE Press |
ISSN (Print) | 1930-8833 |
Conference
Conference | 38th European Solid-State Circuit Conference, ESSCIRC 2012 |
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Abbreviated title | ESSCIRC |
Country/Territory | France |
City | Bordeaux |
Period | 17/09/12 → 21/09/12 |
Keywords
- EWI-23147
- METIS-296343
- IR-84553