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In this paper, a design of current-mode control switching regulator was presented with loop gain analysis. The analysis was verified by the chip implementation and measurement. A current mirror based current sensor was used to sensing the inductor current information. This chip has been fabricated with a TSMC 2P4M 0.35μm polyside CMOS process. The measurement result verify the buck converter with...
The design of a low-voltage fast-transient low-dropout regulator (LDR) with a current feedback buffer (CFB) for system-on-ship (SoC) applications is presented. When the CFB senses variation in the load current, it quickly controls the power transistor to achieve fast-transient and small output voltage variation. The proposed LDR has high current efficiency because the CFB can adjust the quiescent...
The design of a low voltage and low ground current low-dropout voltage regulator (LDO) with transient enhanced circuit (TEC) for system-on-ship (SoC) application was presented. The TEC consists of the two comparator and two auxiliary transistors. The comparators sense the variation of load current; moreover, it can control the auxiliary transistors to push or pull the gate voltage of power transistor...
An output buffer with slew-rate calibration for different TFT-LCD loadings is presented. Unlike other output buffers of column drivers, the proposed output buffer adjusts the output current according to the loading capacitors. The settling time and slew-rate of the proposed output buffer are thus fixed in an acceptable range for different TFT-LCD loading capacitors, allowing more accurate color quality...
This paper presents a peak current-controlled (PCC) single-inductor dual-output (SIDO) DC-DC buck converter with a time-multiplexing (TM) scheme. Small signal modeling, system compensation, and circuit implementation are discussed. Simulation and measurements confirm the effectiveness of the proposed method. The converter was fabricated using TSMC 0.35-μm CMOS technology. The input supply voltage...
A compact low-offset voltage and low power rail-to-rail output buffer for TFT-LCD panel is presented in this paper. Compared to other push-pull output buffers, the proposed output buffer has self-bias circuit which can achieve the smaller area and the lower power consumption. Two complementary push-pull output buffers drive a pair of column lines realize the rail-to-rail driver construction. In addition,...
Combining the supply ripple subtraction and high-pass filtering can improve the power supply rejection (PSR) over wideband frequency of low dropout regulator (LDO). The proposed LDO is fabricated by TSMC 0.35 ??m 2-poly 4-metal CMOS process. The simulation results at maximum load current of 100 mA, show that PSR at 10 k, 100 k and 1 M are -72 dB, -75 dB and -46 dB, respectively. Therefore, it's well...
The design of a compact low-power highspeed class-AB buffer amplifier for driving the large column line loads of large-size TFT-LCD is presented in this paper. The class-AB buffer amplifier can drive large column line loads up to lOOOpF within 1.28 mus. The proposed class-AB buffer amplifier is implemented with a standard 0.35 mum CMOS 2-poly 4-metal process technology and simulated using HSPICE....
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