A Low-Voltage Low-Power Opamp-Less 8-bit 1-MS/s Pipelined ADC in 90-nm CMOS Technology

Abbasizadeh, Hamed; Rikan, Behnam Samadpoor; Lee, Dong‐Soo; Hayder, Abbas Syed; Lee, Kang-Yoon

doi:10.5573/ieiespc.2014.3.6.416

IEIE Transactions on Smart Processing and Computing

2014

DOI: 10.5573/ieiespc.2014.3.6.416

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A Low-Voltage Low-Power Opamp-Less 8-bit 1-MS/s Pipelined ADC in 90-nm CMOS Technology

Hamed Abbasizadeh¹,

Behnam Samadpoor Rikan²,

Dong‐Soo Lee³

et al.

Abstract: This paper presents an 8-bit pipelined analog-to-digital converter. The supply voltage applied for comparators and other sub-blocks of the ADC were 0.7V and 0.5V, respectively. This low power ADC utilizes the capacitive charge pump technique combined with a source-follower and calibration to resolve the need for the opamp. The differential charge pump technique does not require any common mode feedback circuit. The entire structure of the ADC is based on fully dynamic circuits that enable the design of a very … Show more

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Cited by 3 publications

References 18 publications

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High accuracy, Low Power Spread Spectrum Clock Generator to Reduce EMI for Automotive Applications

Lee¹,

Choi²,

Oh³

et al. 2014

IEIE Transactions on Smart Processing and Computing

Self Cite

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This paper presents a Spread Spectrum Clock Generator (SSCG) based on Relaxation oscillator using Up/Down Counter. The current is controlled by a counter and the spread spectrum of the Relaxation Oscillator. A Relaxation Oscillator with temperature compensation using the BGR and ADC is presented. The current to determine the frequency of the Relaxation Oscillator can be controlled. The output frequency of the temperature can be compensated by adjusting the current according to the temperature using the code that is the output from the ADC and BGR. EMI Reduction of SSCG is 11 dB, and Spread down frequency is 150 kHz. The current consumption is 600 μA from 5V and the operating frequency is from 2.3 MHz to 5.75 MHz. The rate of change of the output frequency with temperature was approximately ±1 %. The SSCG is fabricated in a 0.35um CMOS process with active area 250um x 440um.

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High accuracy, Low Power Spread Spectrum Clock Generator to Reduce EMI for Automotive Applications

Lee¹,

Choi²,

Oh³

et al. 2014

IEIE Transactions on Smart Processing and Computing

Self Cite

View full text Add to dashboard Cite

show abstract

A High Efficiency Active Rectifier for 6.78MHz Wireless Power Transfer Receiver with Bootstrapping Technique and All Digital Delay-Locked Loop

Nga

Park

Lee

2014

IEIE Transactions on Smart Processing and Computing

Self Cite

View full text Add to dashboard Cite

This paper presents a new rectifier with a bootstrapping technique to reduce the effective drop voltage. An all-digital delay locked loop (ADDLL) circuit was also applied to prevent the reverse leakage current. The proposed rectifier uses NMOS diode connected instead of PMOS to reduce the design size and improve the frequency respond. All the sub-circuits of ADDLL were designed with low power consumption to reduce the total power of the rectifier. The rectifier was implemented in CMOS 0.35 μm technology. The peak power conversion efficiency was 76 % at an input frequency of 6.78MHz and a power level of 5W.

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High Efficiency Buck-Converter with Short Circuit Protection

Cho¹,

Park²,

Cho³

et al. 2014

IEIE Transactions on Smart Processing and Computing

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This paper proposes a DC-DC Buck-Converter with DT-CMOS (Dynamic Thresholdvoltage MOSFET) Switch. The proposed circuit was evaluated and compared with a CMOS switch by both the circuit and device simulations. The DT-CMOS switch reduced the output ripple and the conduction loss through a low on-resistance. Overall, the proposed circuit showed excellent performance efficiency compared to the converter with conventional CMOS switch. The proposed circuit has switching frequency of 1.2MHz, 3.3V input voltage, 2.5V output voltage, and maximum current of 100mA. In addition, this paper proposes a SCP (Short Circuit Protection) circuit to ensure reliability.

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A Low-Voltage Low-Power Opamp-Less 8-bit 1-MS/s Pipelined ADC in 90-nm CMOS Technology

Cited by 3 publications

References 18 publications

High accuracy, Low Power Spread Spectrum Clock Generator to Reduce EMI for Automotive Applications

High accuracy, Low Power Spread Spectrum Clock Generator to Reduce EMI for Automotive Applications

A High Efficiency Active Rectifier for 6.78MHz Wireless Power Transfer Receiver with Bootstrapping Technique and All Digital Delay-Locked Loop

High Efficiency Buck-Converter with Short Circuit Protection

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