Peak detector
AssigneeTexas Instruments Incorporated
InventorsMarius Vicentiu Dina, Susan Ann Thompson
Life of this patent
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Abstract
A circuit includes a peak detector, a diode, a dynamic clamp circuit, and an offset correction circuit. The peak detector generates a voltage on the peak detector output proportional to a lowest voltage on the peak defector input. The anode of the diode is coupled to the peak detector input. The dynamic clamp circuit is coupled to the peak detector input and is configured to clamp a voltage on the peak detector input responsive to a voltage on the diode's anode being greater than the lowest voltage on the peak detector's input. The offset correction circuit is coupled to the peak detector output and is configured to generate an output signal whose amplitude is offset from an amplitude of the peak detector output.
Claims8
A circuit, comprising:
- a diode having an anode and a cathode;
- a first transistor having a first control input coupled to the anode;
- a first current source having first and second current source terminals, the first current source terminal coupled to a voltage supply terminal;
- a first resistor coupled between the second current source terminal and the first transistor;
- a second transistor having a second control input;
- a second resistor coupled between the second current source terminal and the second transistor;
- a capacitor coupled between the voltage supply terminal and the second control input;
- a second current source coupled between the power supply terminal and the second control input;
- and
- a third transistor coupled between the second control input and a ground terminal and having a third control input.
Dependencies are inferred from the claim text.