1989-05-05
1990-09-18
Carroll, J.
357 14, 357 20, 357 46, 357 88, H01L 2992, H01L 2906, H01L 2972, H01L 2702
Patent
active
049582097
ABSTRACT:
A semiconductor structure is configurable via a customizing mask either as a varicap diode or as a polysilicon emitter bipolar transistor. The structure forms part of an integrated circuit providing e.g. a voltage controlled oscillator for a crystal frequency standard.
REFERENCES:
patent: 3969750 (1976-07-01), Dhaka et al.
patent: 4314267 (1982-02-01), Bergeron et al.
patent: 4377029 (1983-03-01), Ozawo
patent: 4463322 (1984-02-01), Scott et al.
patent: 4531282 (1985-07-01), Sakai et al.
Carroll J.
STC PLC
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