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US 2015/0084694 A1Published application
Buffer circuit having an enhanced slew-rate and source driving circuit including the same
AssigneeSamsung Electronics Co., Ltd.
InventorSung-Ho Lee
Life of this patent
Estimating the term…
Abstract
A buffer circuit is provided. The buffer circuit includes an operational amplifier and a slew-rate compensating circuit. The operational amplifier amplifies an input voltage signal and generates an output voltage signal. The slew-rate compensating circuit generates a compensation current based on a voltage difference between the input voltage signal and the output voltage signal, and provides the compensation current to a load stage of the operational amplifier.
Claims21
A buffer circuit, comprising:
- an operational amplifier configured to amplify an input voltage signal and to generate an output voltage signal;
- and
- a slew-rate compensating circuit configured to generate a compensation current based on a voltage difference between the input voltage signal and the output voltage signal, and to provide the compensation current to a load stage of the operational amplifier.
17-26. (canceled)
An operational amplifier, comprising:
- an input stage configured to receive an input voltage signal and an output voltage signal, and to determine a voltage difference between the input voltage signal and the output voltage signal;
- a load stage configured to perform a slew-rate compensating operation, to generate load corresponding to the voltage difference, and to provide the load currents to the input stage;
- and
- an output stage connected to the load stage, and configured to generate the output voltage signal.
1 more element
A slew-rate compensating circuit included in a buffer circuit, comprising:
- a pull compensation current generator configured to generate a pull compensation current when an input voltage signal of the buffer circuit is greater than an output voltage signal of the buffer circuit by a predetermined voltage;
- and
- a push compensation current generator configured to generate a push compensation current when the output voltage signal is greater than the input voltage signal by the predetermined voltage.
Dependencies are inferred from the claim text.