Device for controlling discharge of a charge capacitor in a tran

Details Device for controlling discharge of a charge capacitor in a tran Device for controlling discharge of a charge capacitor in a tran

1996-06-20

1997-03-04

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Radar transponder system

Radar transponder only

G01S 1375

Patent

active

056084064

ABSTRACT:
A transponder device (10) includes a discharge circuit (18) to control the discharge of voltage from a charge capacitor (14). The discharge circuit (18) prevents transmission of a data telegram by the transponder device (10) until a voltage of the charge capacitor (14) reaches a threshold voltage level. The threshold voltage level is sufficient to ensure that a complete transmission of the data telegram is performed. Upon reaching the threshold voltage level, a transponder analog and digital circuit (19) initiates transmission of the data telegram. A control logic circuit (32) activates a counter (36) upon the start of the data telegram transmission. The counter (36) generates a control signal that is used to bypass the discharge circuit in order that the charge capacitor (14) can be connected directly to the transponder analog and digital circuit (19). In this manner, sufficient voltage is available at the beginning and end of the data telegram transmission in order to avoid deterioration of the data telegram transmission signal.

REFERENCES:
patent: 4333072 (1982-06-01), Beigel
patent: 5041826 (1991-08-01), Milheiser
patent: 5053774 (1991-10-01), Schuermann et al.
patent: 5489908 (1996-02-01), Orthmann et al.
patent: 5491484 (1996-02-01), Schuermann
patent: 5500651 (1996-03-01), Schuermann

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