Adaptive amplification circuit
AssigneeNovatek Microelectronics Corp.
InventorsXie-Ren Hsu, Chia-Hung Lin, Wei-Hsiang Hung
Life of this patent
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Abstract
An adaptive amplification circuit is disclosed, which includes an operational amplifier including a variable bias current source for providing a variable bias current for the operational amplifier, a simulation unit for simulating operational characteristics of the operational amplifier and transforming a simulation input voltage to a simulation output voltage, and a bias control unit for generating a bias control signal to the variable bias current source according to the simulation output voltage so as to adjust the variable bias current.
Claims19
An adaptive amplification circuit, comprising:
- an operational amplifier, comprising a variable bias current source for providing
- a variable bias current for the operational amplifier;
- a simulation unit for simulating operational characteristics of the operational amplifier, and transforming a simulation input voltage to a simulation output voltage reflecting the simulated operational characteristics of the operational amplifier;
- and
- a bias control unit for generating a bias control signal to the variable bias current source according to the simulation output voltage so as to adjust the variable bias current.
An adaptive amplification circuit, comprising:
- an operational amplifier, comprising a variable bias current source for providing a variable bias current for the operational amplifier;
- a simulation unit for simulating at least one of a charging characteristic and a discharging characteristic, and transforming a simulation input voltage to a simulation output voltage;
- and
- a bias control unit, comprising:
- a reference voltage generation unit for generating a reference voltage;
- a comparator for comparing the simulation output voltage with the reference voltage to generate a comparison signal;
- and
- a bias generation unit for generating a bias control signal to the variable bias current source according to the comparison signal so as to adjust the variable bias current.
An adaptive amplification circuit, comprising:
- an operational amplifier, comprising a variable bias current source for providing a variable bias current for the operational amplifier;
- a simulation unit for simulating operational characteristics of the operational amplifier, and transforming a simulation input voltage to a simulation output voltage, wherein the operational characteristics of the operational amplifier comprises at least one of a charging characteristic and a discharging characteristic;
- and
- a bias control unit for generating a bias control signal to the variable bias current source according to the simulation output voltage so as to adjust the variable bias current.
An adaptive amplification circuit, comprising:
- an operational amplifier, comprising a variable bias current source for providing a variable bias current for the operational amplifier;
- a simulation unit for simulating operational characteristics of the operational amplifier, and transforming a simulation input voltage to a simulation output voltage, wherein the simulation unit comprises at least one of an equivalent circuit and a physical circuit of the operational amplifier;
- and
- a bias control unit for generating a bias control signal to the variable bias current source according to the simulation output voltage so as to adjust the variable bias current.
Dependencies are inferred from the claim text.