8/7/2019 Writing Engineering Abstracts(36)

1/7

Writing Engineering Abstracts(36)

http://www.chineseowl.idv.tw

http://www.chineseowl.idv.tw/http://www.chineseowl.idv.tw/

8/7/2019 Writing Engineering Abstracts(36)

2/7

:(+)

8/7/2019 Writing Engineering Abstracts(36)

3/7

(1 of 2) (+) Low application voltageband-gap circuits are conventionally used in analog andmixed signal circuits. However, conventional band-gapcircuits can only operate above 1.8v, thus limiting theminimum application voltage of analog circuits. The inability

to design a low voltage band-gap circuit in advancedintegrated circuits will not only reduce application lifetime,but also inhibit the development of next generation ICs. Therefore, this work introduces a current and voltagedetection function in a low voltage band-gap circuit. A

low threshold voltage device is tuned for reducingapplication voltage component. A device model is thendeveloped for SPICE simulation. Next, a new current andvoltage detection circuit is simulated and implemented.

Additionally, the proposed band-gap circuit is implementedin other processes.

8/7/2019 Writing Engineering Abstracts(36)

4/7

(2 of 2) Analytical results indicate that theproposed current and voltage detection function reducesthe application voltage from 1.8 V to 1.2 V, increases thecircuit lifetime by approximately 15%, and reduces theoverall application voltage. In addition

to reducing the application voltage, the proposed lowvoltage band-gap circuit enhances the quality of analog ICdesign and provides an accurate reference voltage forother analog circuits.

8/7/2019 Writing Engineering Abstracts(36)

5/7

(1 of 2) (+) Despite their extensive usein multi-power systems, CMOS low-dropout regulators(LDOs) have a slower load transient response than bipolarLDOs have, thus limiting CMOS LDO applications withrespect to fast load changes in advanced power systems.

The inability to design a faster transient response LDO inhigh current change applications will not only cause errorsin other components, but also inhibit the development ofCMOS LDO in advanced power system ICs. Therefore, this work develops a current and voltage

sensing function in the error-amp of LDO circuits. Acurrent mode control circuit is designed for sensing theoutput current. A current feedback path is then analyzed.Next, a novel current and voltage feedback circuit aresimulated, along with its effectiveness confirmed duringwafer prediction. Additionally, the proposed LDO control

circuit is used in other linear control systems.

8/7/2019 Writing Engineering Abstracts(36)

6/7

(2 of 2) Analytical results indicate that, inaddition to increasing both the speed of a feedback signaland the bandwidth of a control system, the proposedcurrent and voltage sensing function minimizes the loadtransient response from 50 mV/us to 25 mV.

Moreover, in addition to minimizing the voltage ofthe load transient response, the advanced CMOS LDOcircuit enhances the quality of power systems and providesan accurate output voltage for other analog or digital ICcircuits As is well known, system-on-a-chip (SOC) design

often requires internal LDOs for minimizing the noise effectbetween two circuit blocks. Importantly, the proposedCMOS LDO circuit upgrades the quality of multi-powersystems in a SOC chip.

8/7/2019 Writing Engineering Abstracts(36)

7/7

Further details can be found at

http://www.chineseowl.idv.tw

http://www.chineseowl.idv.tw/http://www.chineseowl.idv.tw/