US 7,479,833 B2 · Dynamic biasing amplifier apparatus, dynamic biasing apparatus and method

Abstract

A dynamic biasing amplifier apparatus, and dynamic biasing apparatus, and method are disclosed. The dynamic biasing amplifier apparatus includes a comparator unit, a dynamic bias generator unit, and an amplifier unit. The amplifier unit receives an input signal and output an output signal based on at least a bias voltage. The comparator unit compares the positive and negative input signals of the amplifier unit. The dynamic bias generator unit generates and adjusts the bias voltage in accordance with the comparing result of the comparator unit. Therefore, the dynamic bias generator unit controls the amplifier unit to operate in a low static current mode when the input signal is in steady state; and the dynamic bias generator unit controls the amplifier unit to operate in a high dynamic current mode when the input signal is in transition state.

Claims13

Dependent claims

A dynamic biasing amplifier apparatus, comprising:

an amplifier unit, for receiving and amplifying an input signal to output an output signal based on at least a bias voltage;
a comparator unit, for comparing the input and output signals of the amplifier unit;
and
a dynamic bias generator unit, coupled between the comparator unit and the amplifier unit, for generating and adjusting the bias voltage in accordance with a comparing result of the comparator unit, so as to control the amplifier unit to operate in a low static current mode when the input signal is in a steady state, and to control the amplifier unit to operate in a high dynamic current mode when the input signal is in a transition state.

1 more element

A dynamic biasing apparatus, for providing at least a bias voltage to an amplifier unit, so as to control the amplifier unit to amplify an input signal to output an output signal, comprising:

a comparator unit, for comparing a differential input signals;
and
a dynamic bias generator unit, coupled to the comparator unit, for generating and adjusting the bias voltage in accordance with the comparing result of the comparator unit, so as to control the amplifier unit to operate in a low static current mode when the input signal is in a steady state, and to control the amplifier unit to operate in a high dynamic current mode when the input signal is in a transition state.

A dynamic biasing method of an amplifier apparatus, wherein the amplifier apparatus receives an input signal and output an output signal based on at least a bias voltage, comprising:

providing an operating current;
comparing the input and output signals to obtain a comparing result;
if the comparing result shows that a voltage of the input signal is approximate to that of the output signal, adjusting the operating current to a small current value;
if the comparing result shows that the voltage of the input signal is not approximate to that of the output signal, adjusting the operating current to a large current value;
and
wherein the bias voltage is adjusted according to the value of the operating current, so as to control the amplifier apparatus to operate in a low static current mode when the input signal is in a steady state, and to control the amplifier apparatus to operate in a high dynamic current mode when the input signal is in a transition state.

3 more elements

Dependencies are inferred from the claim text.

Dynamic biasing amplifier apparatus, dynamic biasing apparatus and method

Life of this patent

Dynamic biasing amplifier apparatus, dynamic biasing apparatus and method

Life of this patent

Abstract

Claims13