Broadband signal switching equipment

Details Broadband signal switching equipment Broadband signal switching equipment

1991-09-16

1993-05-25

O'Shea, Sandra L.

Communications: electrical

Continuously variable indicating

With meter reading

3408259, H04Q 100

Patent

active

052144240

ABSTRACT:
In broadband signal switching equipment having a cross point matrix in FET technology whose switch elements respectively controlled by a holding memory cell are respectively formed by a series circuit of a switching transistor and of an input transistor, an n-channel series pass transistor that has its control electrode connected to a reference potential source is respectively inserted between the matrix output line and the following output amplifier circuit. This n-channel series pass transistor, together with a matrix output line pre-charging transistor connected to the input of the output amplifier circuit, forms a charge transfer circuit that effects a voltage amplification. A pre-charging transistor that also has its control electrode connected to the pre-charging phase/evaluation phase clock signal line is also connected to the input of an input driver circuit that precedes a matrix input line, a transfer gate that precedes the input driver circuit also being simultaneously controlled proceeding from this pre-charging phase/evaluation phase clock signal line.

REFERENCES:
patent: 4577190 (1986-03-01), Law
patent: 4801936 (1989-01-01), Hofmann
patent: 4998101 (1991-03-01), Trumpp et al.
patent: 5043724 (1991-08-01), Trumpp et al.
patent: 5121111 (1992-06-01), Trumpp et al.
"Cascode Voltage Switch Logic" by Erdelyi et al, IBM Technical Disclosure Bulletin, vol. 27, No. 7A, Dec. 1984, pp. 3791-3793.
"Custom & Semi-Custom Design Techniques", by Heller et al, IEEE International Solid State Circuits Conference, Feb. 22, 1984, pp. 16-17.
"Digital CMOS Circuit Design", Kluwer Academic Publishers, 1986, pp. 198-200.

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