Signal amplifier, signal receiving circuit including the same, and device including the same
First Claim
1. A signal amplifier, comprising:
- a first amplifier to amplify a first input signal to form a first amplified output signal, the first input signal having a common mode voltage in a first voltage range and the first amplified output signal having a common mode voltage in a second voltage range different from the first voltage range;
a second amplifier to amplify a second input signal to form a second amplified output signal, the second input signal, different from the first input signal, having a common mode voltage in the second voltage range and the second amplified output signal having a common mode voltage in the second voltage range, wherein the first amplifier is off when the second amplifier is on and the second amplifier is off when the first amplifier is on; and
an output to output the first amplified output signal or the second amplified output signal as an amplified output signal.
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Accused Products
Abstract
A signal amplifier includes a first amplifier, a second amplifier, and an output. The first amplifier amplifies a first input signal to form a first amplified output signal. The first input signal has a common mode voltage in a first voltage range, and the first amplified output signal has a common mode voltage in a second voltage range different from the first voltage range. The second amplifier amplifies a second input signal to form a second amplified output signal. The first input signal has the common mode voltage in the second voltage range and the second amplified output signal has the common mode voltage in the second voltage range. The output outputs the first amplified output signal or the second amplified output signal as an amplified output signal.
11 Citations
20 Claims
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1. A signal amplifier, comprising:
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a first amplifier to amplify a first input signal to form a first amplified output signal, the first input signal having a common mode voltage in a first voltage range and the first amplified output signal having a common mode voltage in a second voltage range different from the first voltage range; a second amplifier to amplify a second input signal to form a second amplified output signal, the second input signal, different from the first input signal, having a common mode voltage in the second voltage range and the second amplified output signal having a common mode voltage in the second voltage range, wherein the first amplifier is off when the second amplifier is on and the second amplifier is off when the first amplifier is on; and an output to output the first amplified output signal or the second amplified output signal as an amplified output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A signal amplifier, comprising:
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a first type folded-cascode amplifying part configured to receive a first input signal pair and output a first amplified output signal pair in response to a first state of an enable signal; a second type common source amplifying part configured to receive a second input signal pair, different from the first input signal pair, and output a second amplified output signal pair in response to a second state of the enable signal; and an output part including a load for the first type folded-cascode amplifying part and the second type common source amplifying part, and configured to output one of the first amplified output signal pair and the second amplified output signal pair as an amplified output signal pair. - View Dependent Claims (13, 14, 15, 16)
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17. A signal receiving circuit, comprising:
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a signal amplifying portion including a first type folded-cascode amplifier configured to receive a first input signal pair and output a first amplified output signal pair in response to a first state of an enable signal, a second type common source amplifier configured to receive a second input signal pair, different from the first input signal pair, and output a second amplified output signal pair in response to a second state of the enable signal, and an output including a load for the first type folded-cascode amplifier and the second type common source amplifier, and configured to output one of the first amplified output signal pair and the second amplified output signal pair as an amplified output signal pair; and an output portion configured to output an output signal based on the amplified output signal pair, wherein an input terminal of the output portion includes transistors of a same conductivity type. - View Dependent Claims (18, 19, 20)
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Specification