Referenced Items are not available for this document.
A 2-GHz Si-bipolar direct-conversion quadrature modulator with a wide bandwidth is described. It operates at a low supply-voltage of 2 V and features a “current-folded” double-balanced mixer with a two-stacked-transistor configuration, and a tunable RC/CR 90° phase shifter that reduces the amplitude imbalance and the phase error over a wide bandwidth (0.8 to 2 GHz). The modulator is implemented using 18-GHz Si-bipolar technology and dissipates only 68 mW at 2 V. The image ratio at 2 GHz is about -37 dBc, corresponding to a phase error of 1.6°. Moreover, both second-order and third-order products, and local signal leakage are less than -40 dBc
Published in:
Solid-State Circuits, IEEE Journal of
(Volume:31
,
Issue:
2
)
Date of Publication: Feb 1996
- Page(s):
- 263 - 267
- ISSN :
- 0018-9200
- INSPEC Accession Number:
- 5258978
- Digital Object Identifier :
- 10.1109/4.488005
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Feb 1996
- Sponsored by :
- IEEE Solid-State Circuits Society
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