Chapter 7
Orthogonal summation
A 2 × 3-bit all-digital I/Q RFDAC*
Abstract
The novel idea of the orthogonal I/Q combination in the all-digital RFDAC proposed in the previous chapter is now elaborated and experimentally proven as a low-resolution version in 65 nm CMOS. Schematic details are provided for anyone to replicate the results.
Keywords
Modulator; Balance-unbalance (balun); Transformer; RF choke; Power combiner; Quadrature phase shift keying (QPSK); Frequency divider
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