Voltage regulation circuit for RFID systems
First Claim
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1. A voltage regulation circuit for an RFID circuit comprising:
- a voltage limiter circuit having a current sensing element for sensing current through the voltage limiter circuit, the voltage limiter generating a limited voltage;
a voltage regulator coupled to the limited voltage for generating a regulated output voltage, the voltage regulator having a dynamic biasing current responsive to an output of the sensing element for increasing bandwidth of the voltage regulator when current in the voltage limiter circuit increases.
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Abstract
A voltage regulation circuit for an RFID circuit having a voltage limiter circuit including a current sensing element for sensing current through the voltage limiter circuit. The voltage limiter generates a limited voltage. A voltage regulator is coupled to the limited voltage for generating a regulated output voltage. The voltage regulator has a dynamic biasing current responsive to an output of the sensing element for increasing bandwidth of the voltage regulator when current in the voltage limiter circuit increases.
26 Citations
15 Claims
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1. A voltage regulation circuit for an RFID circuit comprising:
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a voltage limiter circuit having a current sensing element for sensing current through the voltage limiter circuit, the voltage limiter generating a limited voltage; a voltage regulator coupled to the limited voltage for generating a regulated output voltage, the voltage regulator having a dynamic biasing current responsive to an output of the sensing element for increasing bandwidth of the voltage regulator when current in the voltage limiter circuit increases. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification