Voltage regulation system comprising operating condition detection means

• US 7,443,144 B2
• Filed: 04/05/2004
• Issued: 10/28/2008
• Est. Priority Date: 04/16/2003
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Uguen, Emeric
• Primary Examiner(s): Patel; Rajnikant B
• Application Number:
  US10/545,177
• Publication Number:
  US 20060192542A1
• Time in Patent Office: 1,667 Days
• Field of Search: 323312-316, 323272-276, 323/303, 323/224, 323/226, 323284-286, 307/296, 307/296.8, 330/252, 330/69, 327/85, 327/86, 327/513
• US Class Current: 323/224
• CPC Class Codes: G05F 1/565 sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor G05F1/563 takes precedence

Abstract

The invention relates to a system for generating an output voltage (Vout) from an input voltage (Vup), said system comprising:—regulation means (T1) for regulating said output voltage (Vout) to a target voltage level (Vcons), said regulation means (T1) comprising a control terminal intended to receive a regulation signal (SR) and an output terminal for delivering said output voltage (Vout),—first control means (COMP1) for delivering a first control signal (SC1) from a comparison between said regulation signal (SR) and a first reference signal (Vref1).

Claims

1. A system for generating an output voltage from an input voltages, said system comprising:

regulation means for regulating said output voltage to a target voltage level, said regulation means comprising a control terminal that receives a regulation signal and an output terminal for delivering said output voltage;

first control means for delivering a first control signal from a comparison between said regulation signal and a first reference signal, the first control signal forming an indication that the regulation signal is outside a normal range; and

second control means for delivering a second control signal from a comparison between a fraction of the current delivered by said regulation means on said output terminal and a second reference signal, the second control signal forming an indication that an output current is outside a normal range.

2. A system as claimed in claim 1 comprising means for deactivating the generation of said output voltage from said first control signal and/or said second control signal.

3. An interface circuit comprising a system as claimed in claim 1 for generating said output signal to a smart card.

4. A smart card reader comprising an interface circuit as claimed in claim 3.

5. An integrated circuit comprising a system as claimed in claim 1.