A low-voltage, low-power current-mode automatic gain control (AGC) for battery-powered equipment

Abstract

In this paper, a current-mode Automatic Gain control (AGC)

Variable gain current mirror for high-speed applications

“…Different methods for designing a variable-gain current mirror have been reported in the literature [2,3,4,5,6]. The methods presented in [2,3,4] introduce level shifters in the signal path.…”

“…The methods presented in [2,3,4] introduce level shifters in the signal path. This not only increases the minimum supply voltage of the circuit by about one threshold voltage (compared to a conventional current mirror) but also degrades the frequency response of the circuit.…”

“…1 (a)). A variable-gain current mirror finds vast applications in a variety of circuits such as automatic gain control (AGC) [2], tuning of continuous time filters [3], trimming of precision analog circuits [4] and many more.…”

Low Voltage Programmable Double-Gate MOSFETs Current Mirror and Its Application As Programmable-Gain Current Amplifier

“…Recently, different techniques used for designing tunable current mirrors have been reported in the literature [2]- [5]. The technique proposed in [2] and [3], using level shifters in the signal path, degrades the frequency response of the circuit, increases the chip area, and increases the power dissipation.…”

“…The technique proposed in [2] and [3], using level shifters in the signal path, degrades the frequency response of the circuit, increases the chip area, and increases the power dissipation. The approach adapted in [4], using floating gate MOSFET transistors to tune the current mirror, has limited tuning range.…”