Differential blocking sampler, in particular for an analog...

Details Differential blocking sampler, in particular for an analog... Differential blocking sampler, in particular for an analog...

2004-10-15

2009-12-22

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S094000, C341S122000

Reexamination Certificate

active

07635996

ABSTRACT:
The invention relates to a blocking sampler intended in particular to be used upstream of a fast analog digital converter.The blocking sampler comprises two main semi-samplers each having a respective differential input (E, E′) and a respective differential output (S, S′). With each main semi-sampler is associated a respective auxiliary blocking semi-sampler comprising an auxiliary tracking transistor (T1a, T1a′) powered by a voltage tapped off from the terminals of the storage capacitor (C′, C) of the other main blocking sampler, an auxiliary storage capacitor (Ca, Ca′) linked to the output of this auxiliary tracking transistor and an auxiliary current switch (T2a, T3a, SC1a; T2′a, T3′a, SC1a′) controlled in synchronism with the current switch of the main blocking sampler so as to authorize or block the passage of current in the auxiliary tracking transistor. The auxiliary samplers serve to improve the sampling dynamics in the cases where the signal to be sampled varies rapidly.

REFERENCES:
patent: 6031398 (2000-02-01), Karanicolas
patent: 0532108 (1993-03-01), None
patent: 1074996 (2001-02-01), None
Razzaghi et al.. “A 10-b, 1-GSample/s track-and-hold amplifier using SiGe BiCMOS technology”. Sep. 21-24, 2003. IEEE Custom Integrated Circuits Conference. pp. 433-436.
Razzaghi A et al: “A 10-b, 1-GSample/s track-and-hold amplifier using SiGe BiCMOS technology” 2003, Piscataway, NJ, USA Sep. 2003 pp. 433-436.
Fiocchi C et al: “Design Issues on High-Speed High-Resolution Track-and-Holds in BiCMOS Technology”; IEEE-Proceedings: Circuit Devices and Systems, Institution of Electrical Engineers, Stenvenage, GB, vol. 147, No. 2, (Apr. 7, 2000), p. 100-106, XP006013845; ISSN: 1350-2409.

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