Dr. Susan Schober

COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES AND AMPLIFIERS

WO2017019064

2017-02-02

COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES AND AMPLIFIERS

US10211781

2019-02-19

COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES AND AMPLIFIERS

EP3329598

2018-06-06

COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES AND AMPLIFIERS

CA3031736

2017-02-02

COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES AND AMPLIFIERS

CN10814121

2018-06-08

COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES AND AMPLIFIERS

KR20180034555

2018-04-04

SUPER-SATURATION CURRENT FIELD EFFECT TRANSISTOR AND TRANS-IMPEDANCE MOS DEVICE

WO2017105554

2017-06-22

SUPER-SATURATION CURRENT FIELD EFFECT TRANSISTOR AND TRANS-IMPEDANCE MOS DEVICE

US10283506

2019-05-07

SUPER-SATURATION CURRENT FIELD EFFECT TRANSISTOR AND TRANS-IMPEDANCE MOS DEVICE

CN108140613

2018-06-08

MULTI-STAGE AND FEED FORWARD COMPENSATED COMPLEMENTARY CURRENT FIELD EFFECT TRANSISTOR AMPLIFIERS

WO2017019973

2017-02-02

MULTI-STAGE AND FEED FORWARD COMPENSATED COMPLEMENTARY CURRENT FIELD EFFECT TRANSISTOR AMPLIFIERS

US20180226930

2018-08-09

MULTI-STAGE AND FEED FORWARD COMPENSATED COMPLEMENTARY CURRENT FIELD EFFECT TRANSISTOR AMPLIFIERS

CN108141181

2018-06-08

LOW NOISE TRANS-IMPEDANCE AMPLIFIERS BASED ON COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES

WO2017019978

2017-02-02

LOW NOISE TRANS-IMPEDANCE AMPLIFIERS BASED ON COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES

US20180219519

2018-08-02

LOW NOISE TRANS-IMPEDANCE AMPLIFIERS BASED ON COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES

CN108141180

2018-06-08

REFERENCE GENERATOR AND CURRENT SOURCE TRANSISTOR BASED ON COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES

WO2017019981

2017-02-02

REFERENCE GENERATOR AND CURRENT SOURCE TRANSISTOR BASED ON COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES

US20180224878

2018-08-09

REFERENCE GENERATOR AND CURRENT SOURCE TRANSISTOR BASED ON COMPLEMENTARY CURRENT FIELD-EFFECT TRANSISTOR DEVICES

CN108140614

2018-06-08

SCALABLE INTEGRATED DATA CONVERTER

WO2017106835

2017-06-22

SCALABLE INTEGRATED DATA CONVERTER

EP3391544

2018-10-24

SCALABLE INTEGRATED DATA CONVERTER

CN108702155

2018-10-23

SCALABLE INTEGRATED DATA CONVERTER

JP2019504585

2019-02-14

LOW NOISE SENSOR AMPLIFIERS AND TRANS-IMPEDANCE AMPLIFIERS USING COMPLEMENTARY PAIR OF CURRENT INJECTION FIELD-EFFECT TRANSISTOR DEVICES

WO2018098389

2018-05-31

PHASE FREQUENCY DETECTOR AND ACCURATE LOW JITTER HIGH FREQUENCY WIDE-BAND PHASE LOCK LOOP

WO2016118936

2016-07-28

PHASE FREQUENCY DETECTOR AND ACCURATE LOW JITTER HIGH FREQUENCY WIDE-BAND PHASE LOCK LOOP

US20170373697

2017-12-28

PHASE FREQUENCY DETECTOR AND ACCURATE LOW JITTER HIGH FREQUENCY WIDE-BAND PHASE LOCK LOOP

CA2973368

2016-07-28

PASSIVE PHASED INJECTION LOCKED CIRCUIT

WO2016118183

2016-07-28

PASSIVE PHASED INJECTION LOCKED CIRCUIT

US20180019757

2018-01-18

PASSIVE PHASED INJECTION LOCKED CIRCUIT

CA2974821

2016-07-28

TRACK AND HOLD CIRCUIT

WO2018200482

2018-12-06

CHARGE-BASED PHASE LOCKED LOOP CHARGE PUMP

US8525564

2013-09-03

ELASTOMERIC OPTICAL TACTILE SENSOR

WO2012129410

2012-12-27

Susan Schober, John Choma

2015

This paper presents a wide-operating range analog phase locked loop (PLL) constructed from all-digital integrated circuit (IC) process components. Specifically, this work introduces 2 cutting-edge, scalable analog circuit designs for a charge pump (CP) and a voltage controlled oscillator (VCO). The ultra-low power and highly accurate CP circuit uses 6 minimum-sized transistors, a small metal interconnect capacitor, and, unlike the state-of-the-art, no current mirrors. The ring VCO has a reconfigurable, expandable structure and is capacitively tunable allowing for an exceptionally large frequency operating range of 0.8 to 28.2GHz making it suitable for variety of wireless and wireline applications. The PLL has been fabricated in a TSMC 40nm all-digital CMOS process and physically tested with a 0.5-1.2V supply. The fabricated PLL has an area of 0.0048mm 2 , consumes a maximum of 1.25mW, and has a 0.82 ±0.0275ps RMS jitter over the entire operating range.

Susan Schober, John Choma

2015

Susan Schober, John Choma

2015

This paper presents a high performance, ultra-low power scalable charge pump (CP) design for analog phase locked loops (PLLs). The compact CP circuit uses 4 minimum-sized transistor switches and a relatively small capacitor for transferring charge within the PLL to adjust the voltage controlled oscillator (VCO) frequency. Unlike the state of the art, the proposed CP design does not use current mirrors, has the ability to operate at very low voltages, and does not suffer from traditional mismatch errors due to its unique design. The fast switching action of the proposed CP allows for the use of a no-added delay D-flip flop (DFF) based phase-frequency detector (PFD) resulting in reduced PLL control loop delay and very low reference spurs in a PLL design. The proposed CP has been fabricated with a 1-10GHz PLL in TSMC all-digital 40nm CMOS process and physically tested with a variable 0.5-1.2V supply and a 50MHz-1GHz reference frequency. The charge pump has an active area of 0.0004mm 2 , consumes on average 250pW power, and has a 0.1-0.3° phase error, depending on the PLL frequency of operation.

Roya Sheybani, Susan M. Schober, Ellis Meng

2013

Drug delivery is essential for the treatment of chronic conditions. Implantable site-specific drug delivery devices offer direct delivery to the site of therapy, improving treatment outcomes while reducing side effects and overall associated healthcare costs. Microelectromechanical systems (MEMS) miniaturize infusion pumps such that they are implantable; wirelessly-powered to eliminate the use of bulky, limited lifetime batteries; and volume efficient. Wireless communication allows remote monitoring of device status and performance, and remotely initiated changes to the drug regimen for patient tailored therapy. Requirements for a MEMS drug delivery device with wireless powering and data communication are presented along with an example of such a device.

Susan Schober, John Choma

2015

This paper presents a novel tunable wide-operating range capacitively phase-coupled low noise, low power ring-based voltage controlled oscillator (VCO) for use in multi-GHz phase-locked loops (PLLs). The basic building blocks of the ring oscillator (RO) design are discussed along with a technique to expand the VCO to a variety of phases and frequencies without the use of physical inductors. Improved performance with minimal phase noise are achieved in this ring VCO design through distributed passive-element injection locking (IL) of the staged phases via a network of symmetrically placed metal interconnect capacitors. Using this method, a 0.8-to-28.2 GHz quadrature ring VCO was designed, fabricated, and physically tested with a PLL in an all-digital 40nm TSMC CMOS process. Most notably the proposed quadrature VCO occupies an area of 0.0024mm2, consumes a power of 0.88mW at a 1.0V supply voltage, and possesses a phase noise of -124.5dBc/Hz at the 10MHz offset for a carrier frequency of 28.0GHz.