A High Slew Rate Operational Amplifier for an LCD Driver IC

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概要

• 論文の詳細を見る

• This paper describes an efficient slew rate enhancement technique especially suitable for an operational amplifier used in an LCD driver IC. This technique employs an input-dependent biasing without directly monitoring an input ; instead, monitoring an output of the first stage of the amplifier. This enhancement technique is easily applied to a conventional two-stage operational amplifier and requires only 8 additional transistors to increase slew rates for both rising and falling edges. The bias currents of the first and the second stages are simultaneously controlled by this biasing. Experimental operational amplifiers with and without this enhancement have been fabricated to demonstrate the improvement of slew rate. Slew rates of 12.5 V/μsec for the rising edge and 50 V/μsec for the falling edge with a 100 pF load capacitance have been achieved by this technique, compared with slew rates of 0.3 V/μsec for the rising edge and 5 V/μsec for the falling edge in the conventional amplifier.

• 社団法人電子情報通信学会の論文
• 1995-02-25

著者

• Itakura Tetsuro

  Research & Development Center Toshiba Corporation

関連論文

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• Design of Fully Balanced Analog Systems Based on Ordinary and/or Modified Single-Ended Opamps (Special Section on Analog Circuit Techniques and Related Topics)
• High Output-Resistance CMOS Current Mirrors for Low-Voltage Applications
• An Offset-Compensated CMOS Programmable Gain Amplifier (Special Section on Analog Circuit Techniques for System-on-Chip Integration)
• A High Slew Rate Operational Amplifier for an LCD Driver IC
• 10μA Quiescent Current Opamp Design for LCD Driver ICs (Srecial Section on Analong Circuit Tectningues in the Digital-oriented Era)

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