Temperature compensated integrator
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsTsung-Hsien Tsai, Min-Shueh Yuan, Chien-Hung Chen
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Abstract
A representative integrator includes an amplifier having an input and an output; a feedback loop coupled between the input and the output of the amplifier, the feedback loop comprising a compensated resistor circuit having a resistance value selected for reducing a loss factor of the integrator; and a control circuit coupled to an input of the compensated resistor circuit, the control circuit producing a control signal for controlling the compensated resistor circuit to substantially maintain the resistance value selected for reducing the loss factor of the integrator across a range of integrator temperatures.
Claims16
An integrator comprising:
- an amplifier having an input and an output;
- a feedback loop coupled between the input and the output of the amplifier, the feedback loop comprising a compensated resistor circuit coupled in series with a capacitor and having a resistance value selected for reducing a loss factor of the integrator;
- and
- a control circuit coupled to an input of the compensated resistor circuit, the control circuit producing a control signal for controlling the compensated resistor circuit to substantially maintain the resistance value selected for reducing the loss factor of the integrator across a range of integrator temperatures.
A electronic filter comprising:
- an amplifier having an input and an output;
- a feedback loop coupled between the input and the output of the amplifier, the feedback loop comprising a transistor having a resistance value selected for reducing a loss factor of the filter;
- a current mirror circuit coupled to an input of the transistor;
- and
- a current source coupled to an input of the current mirror circuit, the current source producing a reference current that changes as the filter temperature changes, wherein the current mirror circuit produces a voltage signal that changes based on the reference current from the current source to substantially maintain the resistance value selected for reducing the loss factor of the filter across a range of filter temperatures.
Dependencies are inferred from the claim text.