Highly linear Post Distortion Cancellation common-gate Gilbert-mixer in Ku-band

Abstract

This paper presents a new Post Distortion Cancellation (PDC) Gilbert-mixer for Ku-band applications to minimize the thirdorder nonlinear current of transconductance transistors. To illustrate the effectiveness of this scheme, distortion analysis using Volterra series is given. An extra inductor is added between source nodes of switching transistors to decrease the deteriorating effect of parasitic capacitances. The proposed mixer has been simulated in a 0.18-µm RF-CMOS technology and consumes only 6-mW from a 1.8-V supply. Compared to conventional Gilbert-mixer, it typically improves IIP3 by 4.2 dB, power conversion gain by 1.1 dB and noise figure by 1.4 dB. Keywords: Post Distortion Cancellation technique, Ku-band, CMOS, common-gate Gilbert-mixer Classification: Integrated circuits References[1] B. Gilbert, "A precise four quadrant multiplier with subnanosecond response," IEEE J. Solid-State Circuits, vol. 3, no. 4, pp. 365-373, Dec. 1968 Lett., vol. 16, no. 4, pp. 182-184, April 2006. [7] N. Kim, V. Aparin, K. Barnett, and C. Persico, "A cellular-band CDMA 0.25 µm CMOS LNA linearized using active post-distortion," IEEE J.

A 2.4-GHz highly linear derivative superposition Gilbert cell mixer

“…The transconductance stage can be made by common-gate or common-source configurations. Most common-gate structures present wider bandwidth compared to the common-source structure that tolerates a higher gate source capacitor [4].…”

UWB, high gain and highly linear Gilbert-Cell mixer in K-band

“…The π-Network is implemented by means of total parasitic capacitors appeared at nodes between RF and LO stage and one inductor added between them. Also, postdistortion cancellation (PDC) technique is utilized simultaneously to provide high linearity by adding two auxiliary PMOS transistors to each side of circuit [4]. This paper is organized as follows.…”

“…In addition, moderate noise figure are achieved. The auxiliary PMOS transistors (M 7 and M 8 ) are used to implement the PDC technique which improves linearity by means of linearizing RF stage current [4]. Moreover, they can provide the required C P 1 capacitor by its own C gs capacitor for π-Network.…”