Abstract—This paper presents an all-digital class-G quadrature switched-capacitor power amplifier (Q-SCPA) implemented in 65nm CMOS. It combines in-phase (I) and …
For the Class-G operation in the IQ-cell-shared quadrature SCPA, a merged cell switching (MCS) technique comprising vector amplitude switching (VAS) and vector phase switching ( VPS) is proposed, which boosts system efficiency (SE) by enabling the Class -G operation with multiple supply voltages. A 30.1-dBm quadrature transmitter is implemented based …
This paper presents an all-digital class-G quadrature switched-capacitor power amplifier (Q-SCPA) implemented in 65nm CMOS. It combines in-phase (I) and …
Quadrature hybrid couplers are basic building blocks for many RF and microwave systems. This post covers how they are used and looks at benefits and drawbacks of various methods for compact quadrature hybrid couplers. ... Knowles Precision Devices is a premier global source for Capacitors, RF Filters, EMI Filters, …
@article{Lee2022ACW, title={A Compact Wideband Joint Bidirectional Class-G Digital Doherty Switched-Capacitor Transmitter and N-Path Quadrature Receiver through Capacitor Bank Sharing}, author={Jeongseok Lee and Doohwan Jung and David Joseph Munzer and Hua Wang}, journal={2022 IEEE Custom Integrated Circuits …
This work proposes an Ultra-Wide Band, Quadrature Voltage Controlled Oscillator (QVCO) employing an on-chip inductor and 8-Bit Capacitor-Bank (Cap-Bank) in addition to the MOS-Varactors, to bring in the best compromise between above two said constraints. The additional efforts are kept generating Quadrature operation and keeping …
"A Quadrature Switched Capacitor Power Amplifier" IEEE Journal of Solid-State Circuits, v.51, 2016 10.1109/JSSC.2015.2496956 Citation Details Yuan, Wen and Walling, Jeffrey S. "A switched-capacitor controlled digital-current modulated class-E EER transmitter" New Circuits and Systems Conference (NEWCAS), 2015 IEEE 13th International, 2015 10. ...
This paper presents a transformer combined, quadrature switched-capacitor power amplifier (Q-SCPA) that amplifies in-phase (I) and quadrature (Q) signals separately and combines them in a power-combining transformer. The unit SCPA utilizes a class-G dual-supply architecture to improve efficiency at backoff. This counteracts losses associated ...
Polar DPA: Switched-Capacitor PA (SCPA) Class-D PA with capacitive voltage divider. Bottom plate charge redistribution. Very linear precision capacitors and low-loss switches.
Quadrature Oscillator (Part 1) A quadrature oscillator produces two sinewaves with 90° phase difference between them. These are useful to pan ... This means that a capacitor can ''look like'' an inductor, and the value realized is a function of both the capacitor value and the gyrator action. Fortunately it is quite easy to
unit capacitors with individual driver chains that can be either switched between . V DD and V GND, or held at V GND. A quadrature clock is generated that switches the subarrays such that the - I-array rising edge leads the Q-array rising edge by 90°. In previous quadrature transmitter designs the clock was operated with a
The proposed circuit provides two quadrature outputs. In addition, a third output is further available and its relationship is listed in Table 1. For the equal resistor- and capacitor-based design, the three outputs show a progressive phase shift of 45°.
A switched-capacitor power amplifier (SCPA) that realizes an envelope elimination and restoration/polar class-G topology is introduced. A novel voltage-tolerant switch enables the use of two power ...
Abstract: This paper presents a transformer combined, quadrature switched-capacitor power amplifier (Q-SCPA) that amplifies in-phase (I) and quadrature (Q) signals separately and combines them in a power-combining transformer. The unit SCPA utilizes a class-G dual-supply architecture to improve efficiency at backoff. This …
• Quadrature Switched Capacitor PA • Implementation and Measurements • Conclusions. RMO3B-4. 19. RFIC2015. Chip Photograph • 65nm RF CMOS (UTM, MiM) RMO3B-4. 20. RFIC2015. QSCPA: Static Measurements - I. RMO3B-4 • Rolloff below 2GHz external balun. 21. RFIC2015. QSCPA: Static Measurements - II. RMO3B-4. 22. RFIC2015.
This paper proposes a 16-bit 6-channel high-voltage successive approximation register (SAR) ADC with an optimized 5 + 5 + 6 segmented capacitor array. The lower 10 bits of the capacitor array are all composed of unit capacitors without any calibration unit. Without calibration, the lower 10 bits of the capacitor array can ensure 10 …
As a proof-of-concept, the joint bidirectional class-G digital Doherty switched-capacitor TX and N-path Quadrature RX through capacitor bank sharing is implemented in a 45-nm CMOS SOI process.
This work proposes a reconfigurable multi-mode digital transmitter based on quadrature balanced switched-capacitor power amplifiers (QB-SCPA), supporting both full duplex (FD) and half Duplex (HD) operation, and exhibits excellent TX and RX linearity. This work proposes a reconfigurable multi-mode digital transmitter based on quadrature …
A quadrature Class-G switched-capacitor power amplifier (SCPA) is implemented with a merged cell switching (MCS) and an inherent mismatch compensation for dual-supply voltage. The MCS technique improves power added efficiency (PAE) by adopting Class-G operation in quadrature IQ-Cell shared SCPA architecture in an efficient manner. The …
A new circuit based on the proposed generalised approach is relatively insensitive to the parasitic effects of active elements, and easy to design, by way of non-interaction of frequency and condition of oscillations. This study introduces a new approach for realising a sinusoidal oscillator with three outputs, using an active-resistor-capacitor …
A 30.1-dBm quadrature transmitter is implemented based on Class-G IQ-cell-shared switched-capacitor power amplifier (SCPA) and voltage mismatch compensation techniques for dual-supply voltage in a Class-G SCPA. For the Class-G operation in the IQ-cell-shared quadrature SCPA, a merged cell switching (MCS) technique comprising …
This paper presents an all-digital class-G quadrature switched-capacitor power amplifier (Q-SCPA) implemented in 65nm CMOS. It combines in-phase (I) and quadrature (Q) signals on a shared ...
That''s the key point of quadrature generation. Fig. 2 Limiter with finite bandwidth In Fig. 2, the mismatch of resistors and capacitors deviate the output phase difference, f, from 900. Assuming a relative resistor mismatch of a and capacitor mismatch ofb, then we can express f in the vicinity of w =1/(RC) as [tan (1 ) (1 ) tan ] 2 1 a b w 1 w p
This paper presents a quadrature switched-capacitor power amplifier (SCPA) that achieves similar output power and efficiency as polar/EER based digital PAs. …
This work proposes a reconfigurable multi-mode digital transmitter based on quadrature balanced switched-capacitor power amplifiers (QB-SCPA), supporting both full duplex (FD) and half duplex (HD) operation. The QB-SCPA architecture provides built-in passive transmit-receive isolation along with an embedded and wideband self-interference ...
The Q-SCPA combines in-phase (I) and quadrature (Q) signals on a shared capacitor array that results in a 3 dB signal loss, and utilizes a class-G dual-supply architecture to improve efficiency at backoff. This paper presents an all-digital class-G quadrature switched-capacitor power amplifier (Q-SCPA) implemented in 65 nm CMOS. …
In-phase and quadrature components
As a proof-of-concept, the joint bidirectional class-G digital Doherty switched-capacitor TX and N-path Quadrature RX through capacitor bank sharing is implemented in a 45-nm CMOS SOI process.
The Q-SCPA combines in-phase (I) and quadrature (Q) signals on a shared capacitor array that results in a 3 dB signal loss, and utilizes a class-G dual …
This article presents a quadrature switched/floated capacitor power amplifier (SFCPA) with deep back-off efficiency enhancement. The SFCPA is introduced …
quadrature generation at a minimal power consumption. It pushes the designers use the combination of the very low phase noise specifications with very low power consumption
This paper presents an all-digital class-G quadrature switched-capacitor power amplifier (Q-SCPA) implemented in 65nm CMOS. It combines in-phase (I) and …
This paper presents a quadrature switched-capacitor power amplifier (SCPA) that achieves similar output power and efficiency as polar/EER based digital PAs. It combines in-phase (I) and quadrature (Q) signals on a shared capacitor array in the charge domain. The SCPA utilizes a class-G dual-supply architecture to improve …
Understanding Quadrature Demodulation | Radio ...
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