Preamplifier for receiver and method thereof
AssigneeHimax Technologies Limited
InventorsChih-Haur Huang, Chung-Ming Huang
Life of this patent
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Abstract
A preamplifier used in a receiver is provided. The preamplifier comprises an input circuit and an output circuit. The input circuit receives an input differential voltage pair, pulls it down when the common voltage of the input differential voltage pair is higher than a reference voltage. The output circuit receives the input differential voltage pair outputted from the input circuit to pull high or low an output voltage accordingly.
Claims19
A preamplifier used in a receiver, comprising:
- an input circuit receiving an input differential voltage pair, pulling it down when the common voltage of the input differential voltage pair is higher than a reference voltage;
- and
- an output circuit receiving the input differential voltage pair outputted from the input circuit to pull high or low an output voltage accordingly.
A preamplifier used in a receiver, comprising:
- an input circuit receiving an input differential voltage pair, pulling it down when the common voltage of the input differential voltage pair is higher than a reference voltage, and keeping it unchanged when the common voltage is not higher than the reference voltage;
- and
- an amplifier comprising:
- a first stage amplifier, powered by a high supply voltage, for receiving and amplifying the input differential voltage pair outputted from the input circuit to output an internal differential voltage pair;
- and
- a second stage amplifier, powered by a low supply voltage, for receiving and amplifying the internal differential voltage pair to pull high or low an output voltage.
A method for preamplifying an input differential voltage pair, used in a receiver, comprising:
- pulling down the input differential voltage pair when the common voltage of the input differential voltage pair is higher than a reference voltage;
- amplifying the input differential voltage pair to output an internal differential voltage pair;
- and
- amplifying the internal differential voltage pair to pull high or low a first output voltage.
Dependencies are inferred from the claim text.