A Low-Voltage CMOS Buffer for RF Applications Based on a Fully-Differential Voltage-Combiner

Abdollahvand, Somayeh; Santos-Tavares, Rui; Goes, J.

doi:10.1007/978-3-642-37291-9_66

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…In this amplifier, the transistor gate terminal is connected to the output of the CS and CD amplifiers. The main advantages of this structure are the noise cancellation between amplifiers (differential output) [35,37] and the supply current feature to the loads. At the output, 100 X resistors are connected to the amplifiers; 3.…”

Section: Active Balun Blockmentioning

confidence: 99%

A differential IR-UWB transmitter using PAM modulation with adaptive PSD

Moreira

Victor

Saotome

et al. 2021

Analog Integr Circ Sig Process

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The current state of the telecommunications market exhibits a high potential to absorb efficient innovations in wireless connectivity, especially those that can be applied to the Internet of Things and similar domains. Contributing in that direction, this paper describes the design and implementation of a fully differential impulse-radio ultra-wideband (IR-UWB) transmitter using pulse-amplitude modulation, with an adaptive power spectrum density (PSD). The architecture can produce up to eight differential monocycles per clock pulse at its output. The number of monocycles controls the bandwidth (thus the PSD) in the mask of IR-UWB technologies, allowing adaptation to multiple standards. The complete transmitter has four main blocks: (a) a pulse generator, comprising two pulse generating circuit groups, to modulate and create a rectangular waveform; (b) an active balun with two amplifiers, to generate differential signals; (c) a digital demultiplexer, to alternate data to the pulse generating circuit groups; (d) a binary-to-thermometer decoder, to control the amount of generated monocycles per pulse. Simulations demonstrate an output pulse amplitude of 120 mV for the high logic level and of 70 mV for the low logic level, both at a 100 MHz Pulse Repetition Frequency. This produces a mean pulse duration of 277 ps, a mean central frequency of 3.8 GHz, and a mean power consumption 6.7 mW. The transmitter takes the form of an intellectual property core in a 130 nm CMOS technology. The complete transmitter area is 0.067 mm 2 , without I/O pads. The outcomes suggest that the proposed circuit can narrow or widen the output signal bandwidth, providing adaptability to different emission requirements.

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Section: Active Balun Blockmentioning

confidence: 99%

A differential IR-UWB transmitter using PAM modulation with adaptive PSD

Moreira

Victor

Saotome

et al. 2021

Analog Integr Circ Sig Process

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“…The low-voltage DTMOS technique was chosen as the approach to use because of the simplicity of the implementation, since it basically consists in disconnecting the bulks of the PMOS and NMOS devices, respectively from and V SS , and re-connect them to the gate terminal [4,5].…”

Section: Proposed Modifications In the Original Amplifiermentioning

confidence: 99%

Stability Improvements in a Rail-to-Rail Input/Output, Constant Gm Operational Amplifier, at 0.4 V Operation, Using the Low-Voltage DTMOS Technique

Correia¹,

Mancelos²,

Goes³

2014

Technological Innovation for Collective Awareness Systems

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The use of the dynamic threshold MOS (DTMOS) technique is evaluated in a two-stage rail-to-rail Input/Output, constant amplifier. The proper choice of specific transistors in which the technique should be used is presented, as well as the resulting improvements, mainly regarding stability of the circuit at low voltage operation. The DTMOS technique is used in the NMOS transistors of the folded-cascode input stage, allowing the circuit to be stable at V DD = 0.4 V, with equivalent gain and gain-and-bandwidth product (GBW) values achieved with the same value, for the initial circuit operating at 0.8 V. The implemented changes allow the circuit to be stable at low voltage operations without requiring any increase in the cascoded-Miller compensation capacitors, saving circuit area and, consequently, cost.

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A Low-Voltage CMOS Buffer for RF Applications Based on a Fully-Differential Voltage-Combiner

Cited by 2 publications

References 5 publications

A differential IR-UWB transmitter using PAM modulation with adaptive PSD

A differential IR-UWB transmitter using PAM modulation with adaptive PSD

Stability Improvements in a Rail-to-Rail Input/Output, Constant Gm Operational Amplifier, at 0.4 V Operation, Using the Low-Voltage DTMOS Technique

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