Noise Canceling Balun-LNA with Enhanced IIP2 and IIP3 for Digital TV Applications
In: IEICE transactions on electronics, Jg. 95 (2012), Heft 1, S. 146-154
academicJournal
- print, 9 ref
Zugriff:
An inductorless low noise amplifier (LNA) with active balun for digital TV (DTV) applications is presented. The LNA exploits a noise cancellation technique which allows for simultaneous wide-band impedance matching and low noise design. The matching and amplifier stages in the LNA topology perform single-ended to differential signal conversion with balanced output. The second and third-order nonlinearity of the individual amplifiers as well as the distortion caused by the interaction between the stages are suppressed to achieve high IIP2 and IIP3. A method for intrinsic cancellation of the second-order interaction is employed to reduce the dependence of the IIP3 on the frequency spacing between the interfering signals in the two-tone test of DTV tuners. Fabricated in a 0.18 μm CMOS technology, the LNA core size is 0.21 mm2. Measurements show that the LNA IIP3 and IIP2 are +12dBm and +21 dBm, respectively. The IIP3 variation is less than 5 dB in the 10 MHz to 200 MHz frequency spacing range. A voltage gain of 14.5 dB and a noise figure below 4 dB are achieved in a frequency range from 100 MHz to 1 GHz. The LNA consumes 11 mA from a 1.8 V supply voltage.
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Noise Canceling Balun-LNA with Enhanced IIP2 and IIP3 for Digital TV Applications
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Autor/in / Beteiligte Person: | SAEEDI, Saeed ; ATARODI, Mojtaba |
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Zeitschrift: | IEICE transactions on electronics, Jg. 95 (2012), Heft 1, S. 146-154 |
Veröffentlichung: | Oxford: Oxford University Press, 2012 |
Medientyp: | academicJournal |
Umfang: | print, 9 ref |
ISSN: | 0916-8524 (print) |
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