Ultra high speed direct digital synthesizer using InP DHBT technology

  title={Ultra high speed direct digital synthesizer using InP DHBT technology},
  author={Augusto Gutierrez-Aitken and Jun Matsui and Eric N. Kaneshiro and Bert Oyama and Donald Sawdai and A. Oki and D. A. Streit},
  journal={GaAs IC Symposium. IEEE Gallium Arsenide Integrated Circuit Symposium. 23rd Annual Technical Digest 2001 (Cat. No.01CH37191)},
Direct Digital Synthesizers (DDS) offer advantages such as precise beam shaping and forming over conventional RF approaches. This paper discusses novel design and process techniques that enable direct digital synthesis of S-band output frequencies using our current InP double-heterojunction bipolar transistor (DHBT) technology with a cantilevered base layer and undercut collector. The test results demonstrate a DDS chip operating at the world record clock rate of 9.2 GHz. Further design and… CONTINUE READING
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