Reference signal generator

Details Reference signal generator Reference signal generator

1984-12-24

1986-07-29

Heyman, John S.

328 60, 328152, 328 55, H03K 515, H03K 372, H03K 702

Patent

active

046032983

ABSTRACT:
A reference signal generator is controlled by a central processing unit (20) via a multibus interface (22, 24, 26) and includes a plurality of signal channels (2, 4, 6, 8) selectively responsive to external signals (E.sub.c, E.sub.m) or internally generated signals (I.sub.c, I.sub.m2, I.sub.m4, I.sub.m6, I.sub.m8) for providing carrier (12), modulating (16), or amplitude modulated (34) output reference signals (E.sub.o2, E.sub.o4, E.sub.o6, E.sub.o8) having a variety of waveforms. One of the signal channels (8) is arranged to sum the outputs of the other channels. Each of the channels includes an output attenuator (44, 46, 48, 50, 52, 56) which imparts a relatively high resolution to the output reference signals (E.sub.o2, E.sub.o4, E.sub.o6, E.sub.o8) and a circuit (54, 60, 62, 64, 66) which adjusts the range of said output reference signals. A built-in test capability (FIG. 3) is provided which permits selection and testing of the output reference signals from any one of the channels (2, 4, 6, 8).

REFERENCES:
patent: 3832641 (1974-08-01), Herchenrueder
patent: 3983495 (1976-09-01), Epstein
patent: 4423383 (1983-12-01), Svendsen
patent: 4485479 (1984-11-01), Iino et al.

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