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US 7,583,145 B2Granted
Hybrid output stage apparatus and related method thereof
AssigneeRealtek Semiconductor Corp.
InventorChao-Cheng Lee
Life of this patent
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Abstract
The present invention discloses an apparatus for generating an output signal according to an input signal, including a signal generating circuit for generating a first and a second control signal according to the input signal; a first output stage has a first amplifying configuration for receiving the first control signal; and a second output stage has a second amplifying configuration for receiving the second control signal, wherein the first amplifying configuration is different from the second amplifying configuration.
Claims20
An apparatus for generating an output signal according to an input signal, comprising:
- a signal generating circuit, for receiving the input signal and generating a first control signal comprising a first and a second voltage signal and a second control signal comprising a third and a fourth voltage signal;
- a first output stage, having a first amplifying configuration, for receiving the first control signal and generating a first output signal according to the first control signal;
- and
- a second output stage, having a second amplifying configuration, for receiving the second control signal and generating a second output signal according to the second control signal, wherein the first amplifying configuration is different from the second amplifying configuration;
- wherein the first output stage is coupled to the second output stage to form an output terminal, the output terminal outputs at least one of the first output signal and the second output signal as the output signal, and
- the signal generating circuit comprises:
- a first impedance unit having a first end for providing the third voltage signal and a second end for providing the first voltage signal;
- a second impedance unit having a first end for providing the second voltage signal and a second end for providing the fourth voltage signal;
- and
- a third impedance unit, coupled between the first impedance unit and the second impedance unit, comprising a transistor pair for receiving the input signal.
7 more elements
An apparatus for generating an output signal according to an input signal, comprising:
- a signal generating circuit, for receiving the input signal, and generating a first control signal comprising a first and a second voltage signal and a second control signal comprising a third and a fourth voltage signal according to the input signal;
- a first output stage, for receiving the first control signal and outputting an output signal according to the first control signal;
- and
- a second output stage, coupled to the first output stage, for receiving the second control signal and outputting the output signal according to the second control signal;
- wherein when the input signal is a first value, the first and the second output stages are enabled;
- and when the input signal is a second value, the second output stage is disabled;
- and
- the signal generating circuit comprises:
- a first impedance having a first end for providing the third voltage signal and a second end for providing the first voltage signal;
- a first current source coupled to the first end of the first impedance;
- a second impedance having a first end for providing the second voltage signal and a second end for providing the fourth voltage signal;
- and
- a second current source coupled to a second end of the second impedance;
- and
- a third impedance coupled between the first impedance and the second impedance.
12 more elements
A method for receiving an input signal and outputting an output signal, comprising:
- utilizing a signal generating circuit for generating a first control signal comprising a first voltage signal and a second voltage signal and a second control signal comprising a third voltage signal and a fourth voltage signal according to the input signal;
- utilizing a first output stage having a first amplifying configuration to generate a first output signal according to the first control signal;
- and
- utilizing a second output stage having a second amplifying configuration to generate a second output signal according to the second control signal;
- wherein the output signal comprises at least one of the first output signal and the second output signal;
- wherein the first amplifying configuration is different from the second amplifying configuration;
- and
- the signal generating circuit comprises:
- a first impedance having a first end for providing the third voltage signal and a second end for providing the first voltage signal;
- a second impedance having a first end for providing the second voltage signal and a second end for providing the fourth voltage signal;
- and
- a transistor pair, coupled between the first impedance and the second impedance, for receiving the input signal.
9 more elements
Dependencies are inferred from the claim text.