Title: Amplifier for analogue signal samples with automatic gain control, and circuit for digitisation of such samples

Abstract: An electronic device for amplifying, with automatic gain control by discr values, analogue signal samples and thereafter preferably effecting analogue-to-digital conversion of the samples, consists of an amplifier circuit, a comparator circuit, and a delay store circuit. The amplifier has a basic gain during a gain control or gain ranging operation, and supplies an output sample amplified with sufficient gain to bring it into the region of a predetermined voltage. The comparator circuit compares the output of the amplifier circuit with a reference and supplies an output in accordance with the result of the comparison. For analogue-to-digital conversion the amplifier circuit supplies for an input signal U an output signal 2U - VQ, where VQ is the quantification voltage, or, in other embodiments a signal 2U.

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Inventors: Angelle, Philippe (Thouare, FR)
Lefevre, Georges (Nantes, FR)

Application Number: 322333
Filing Date: 1973-01-10
Publication_date: 1976-02-03
Assignee: Societe D'Etudes, Recherches Et Constructions Electroniques Sercel (Carquefou, FR)
Primary Class(es): 341/139 324/115, 330/9, 330/127, 341/158
Other Classes:
US Patent Ref:

2569927	Oct, 1951	Gloess et al.	340/347.
2730676	Jan, 1956	Barker	340/347.
2832827	Apr, 1958	Metzger	340/347.
2969535	Jan, 1961	Foulkes	340/347.
3049701	Aug, 1962	Amdahl et al.	340/347.
3170153	Feb, 1965	Brooks	340/347.
3283319	Nov, 1966	Kaneko	340/347.
3699567	Oct, 1972	Kiyasu et al.	340/347.
3703002	Nov, 1972	Van Saun	340/347.

Other Refs:
Primary Examiner: Miller, Charles D.
Assistant Examiner:
Attorney: Levine; Alan H.