Study and experimentation of a 6-dB attenuation low-pass NGD circuit

Abstract

Because of its counterintuitive nature, the Negative Group Delay (NGD) remains as an uncommon and unfamiliar electronic function. For this reason, the design and analysis of NGD circuits is not well-known for most of electronic designers. This paper initiates a basic and easy to understand theory, in addition to a design methodology for the low-pass NGD function. The circuit theory on the low-pass NGD function is described using a NGD passive topology which is constituted by a RCparallel network with a resistive load. The NGD analysis and synthesis equations in function of NGD specifications are provided and a proof-of-concept of 6dB low-pass NGD circuits has been designed, simulated, fabricated and tested. Frequency and time domain analyses have been performed to validate the low-pass NGD function. Theoretical and simulated results are in very good agreement and a NGD has been obtained in measurement for the proposed structure.

130‐nm BiCMOS design of low‐pass negative group delay integrated RL‐circuit

“…An additional state of the art about the LP-NGD characteristics and physical size from passive circuit available in the literature [10][11][12][13][14] was performed. Table 5 indicates the comparison results with the proposed and designed LP-NGD BiCMOS circuit.…”

“…9 Emphatically, different classes of NGD circuits were proposed and expected to be commonly and conventionally used by the non-familiar and non-specialist engineers in the future. Following the innovative concept, a class of low-pass (LP) NGD function was approved by passive [10][11][12][13][14] and active [15][16][17][18] circuit studies.…”

“…Compact NGD circuits were designed in microstrip technology. 19,20 However, nowadays, the existing NGD electronic circuits [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] are generally designed with centimeter or decimeter size ranges. To overcome the size limitation bottleneck, we would like to develop a design method of NGD integrated circuit (IC) in CMOS technology similar to the classical electronic functions as frequency synthesizer 21 and transceiver devices.…”

“…So far, the study of RL-network based NGD circuits are limited to the topologies implemented with lumped components. [9][10][11][12]14 The first design study of LP-NGD BiCMOS IC is introduced in the present paper which is organized in four main sections as follows:…”

“…Doing this, by inspiring from the inductor component CMOS design, 24,25 an original design method of RL‐network based LP‐NGD passive circuit is initiated in the present paper. So far, the study of RL‐network based NGD circuits are limited to the topologies implemented with lumped components 9–12,14 . The first design study of LP‐NGD BiCMOS IC is introduced in the present paper which is organized in four main sections as follows: Section 2 describes the LP‐NGD passive topology, circuit theory and the analytical characterization.…”