Low Voltage PA design in standard CMOS

Mertens, K.; Steyaert, Michiel

doi:10.1007/0-306-47950-8_18

Cited by 1 publication

(3 citation statements)

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“…When moving toward a submicron CMOS implementation of a Class E amplifier, several problems will appear [22]. As supply voltage decreases, the currents in the circuit will increase for the same output power and the losses in the RF choke can no longer be neglected.…”

Section: A Cmos Integration Of Class E Power Amplifiersmentioning

confidence: 99%

“…Integrating the basic state-space equation (8) and considering the fact that and are time independent leads to (22) and the equivalent expression (23) The derivation of is somewhat more cumbersome. It starts by taking the following derivative: (24) Integrating this expression leads to (25) By using expressions (22) and (23), the above equation can be simplified to (26) in which Equation (26) is the Lyapunov equation [23], and can be solved for the unknown variable since the matrices and are completely determined.…”

Section: B Determining Andmentioning

confidence: 99%

“…It starts by taking the following derivative: (24) Integrating this expression leads to (25) By using expressions (22) and (23), the above equation can be simplified to (26) in which Equation (26) is the Lyapunov equation [23], and can be solved for the unknown variable since the matrices and are completely determined. The computation of can be done e.g., in MATLAB by standard matrix techniques.…”

Section: B Determining Andmentioning

confidence: 99%

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A state-space behavioral model for CMOS class E power amplifiers

Reynaert

Mertens

Steyaert

2003

IEEE Trans. Comput.-Aided Des. Integr. Circuits Syst.

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Class E amplifiers are imposed by time-domain constraints. This makes the design of such amplifiers more difficult than other types of amplifiers. This paper presents a new method to analyze Class E power amplifiers using state-space equations. A description by these equations makes it possible to find the correct initial conditions that leads to the steady-state solution of the amplifier. Furthermore, it is possible to derive the power balance of the power amplifier based on its state-space equations. The presented method has shown to be very valuable when designing switched power amplifiers. Furthermore, the method can also be applied for power amplifiers that do not fulfill the Class E switching conditions.

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Section: A Cmos Integration Of Class E Power Amplifiersmentioning

confidence: 99%