Wide bandwidth CMOS four-quadrant mixed mode analogue multiplier using a second generation current conveyor circuit

Abstract

The current mode responses show ± 150 µ A dynamic range with a maximum THD value about 0.083% and large bandwidth expanded from 2.67 GHz to 3.12 GHz.

New current‐mode RMS‐to‐DC converters and four‐quadrant multiplier/divider based on VDTA

“…4 shows the results of the simulation test of thetransfer (DC) characteristics of the proposed multiplier circuit in the case whenthe input currents are continuously changed in the range from −100 up to +100 μA.Based on this, it can be concluded that the linearity in the transfer characteristicis provided in this range, while the maximum value of THD is about 0.1%. Theproposed multiplier provides a simpler configuration then the circuits described in[3, 19, 31–35], while the low power consumption (<1 mW) employs only asingle VDTA. For these reasons, the proposed multiplier configuration can be usedfor the realisation of variable gain amplifiers, adaptive filters, phase‐lockedloops, amplitude modulators, squarer and frequency doublers [31].…”

Extended Bandwidth Method on Symmetrical Operational Transconductance Amplifier and Filter Application

“…1b. By considering transistors M 1 and M 2 are identical, the relationship between the input and the output cur-rents is given in [15] as the following equations for the simple current mirror circuit for which the equivalent circuit given in Fig. 2a (…”

“…The bandwidth of the circuit depends on the gate-source capacitance C gs and transconductance g m as given in Eq (2) [15].…”

“…For several applications operating at high frequencies, it is necessary to use integrated circuits with wide bandwidth. Therefore, a resistive compensation technique can be used to widen bandwidth of the circuits [15][16][17]. A wide bandwidth second-generation current conveyor based four-quadrant mixed mode analogue multiplier is presented in [15].…”

“…Therefore, a resistive compensation technique can be used to widen bandwidth of the circuits [15][16][17]. A wide bandwidth second-generation current conveyor based four-quadrant mixed mode analogue multiplier is presented in [15]. A conventional low voltage cascode current mirror is analyzed in [16].…”