Back to results
US 12,184,235 B2Granted
Amplifier having improved slew rate
AssigneeDB GlobalChip Co., Ltd.
InventorsMun Gyu Kim, Yong In Park
Life of this patent
Estimating the term…
Abstract
Disclosed is an amplifier having a high slew rate without increasing power consumption. The amplifier includes an input unit, a conversion unit, an amplification unit, a frequency compensation circuit, and a slew rate improvement circuit. Alternatively, the amplifier includes an input unit, a conversion unit, an amplification unit, a frequency compensation circuit, a first slew rate improvement circuit, and a second slew rate improvement circuit.
Claims20
An amplifier comprising:
- an input unit configured to receive a differential input signal at a first input terminal and a second input terminal, the input unit comprising a first input stage having a first AC ground node therein and a second input stage having a second AC ground node therein;
- a conversion unit comprising a first current mirror comprising a first current determiner and a first current follower configured to operate in response to a voltage or current on a first current determination and/or voltage generation node of the first current determiner, a second current mirror comprising a second current determiner and a second current follower configured to operate in response to a voltage or current on a second current determination and/or voltage generation node of the second current determiner, a first transmission gate between the first current determiner and the second current determiner, and a second transmission gate between the first current follower and the second current follower, the conversion unit being configured to provide a first conversion voltage and a second conversion voltage that vary in response to the differential signal at the input unit;
- an amplification unit configured to provide an output voltage in response to the first conversion voltage and the second conversion voltage;
- a frequency compensation circuit comprising (i) a first compensation capacitor between an output terminal and the first current follower and (ii) a second compensation capacitor between the output terminal and the second current follower;
- and
- a slew rate improvement circuit comprising a first slew rate improvement capacitor between the first current determination and/or voltage generation node and the first AC ground node and a second slew rate improvement capacitor between the second current determination and/or voltage generation node and the second AC ground node.
3 more elements
An amplifier comprising:
- an input unit configured to receive a differential input signal at a first input terminal and a second input terminal, the input unit comprising a first input stage having a first AC ground node therein and a second input stage having a second AC ground node therein;
- a conversion unit comprising a first current mirror comprising a first current determiner and a first current follower configured to operate in response to a voltage or current on a first current determination and/or voltage generation node of the first current determiner, a second current mirror comprising a second current determiner and a second current follower configured to operate in response to a voltage or current on a second current determination and/or voltage generation node of the second current determiner, a first transmission gate between the first current determiner and the second current determiner, and a second transmission gate between the first current follower and the second current follower, the conversion unit being configured to provide a first conversion voltage and a second conversion voltage that vary in response to the differential signal at the input unit;
- an amplification unit configured to provide an output voltage in response to the first conversion voltage and the second conversion voltage;
- a frequency compensation circuit comprising (i) a first compensation capacitor between an output terminal and the first current follower and (ii) a second compensation capacitor between the output terminal and the second current follower;
- a first slew rate improvement circuit comprising a switching element configured to reversibly connect each of a first terminal configured to output the first conversion voltage and a second terminal configured to output the second conversion voltage to the output terminal for a predetermined time during which the output voltage transitions in response to the input voltage at the first input terminal;
- and
- a second slew rate improvement circuit comprising a first slew rate improvement capacitor between the first current determination and/or voltage generation node and the first AC ground node and a second slew rate improvement capacitor between the second current determination and/or voltage generation node and the second AC ground node.
4 more elements
Dependencies are inferred from the claim text.