A silicon bipolar 4-bit 1-Gsample/s full Nyquist A/D converter. - Detlef Daniel; Ulrich Langmann; Berthold G. Bosch (IEEE J. Solid State Circuits, 1988)

Multi-Gb/s Silicon Bipolar Clock Recovery IC. - Zhigong Wang; Ulrich Langmann; Berthold G. Bosch (IEEE J. Sel. Areas Commun., 1991)