Reconfigurable Switched-Current Σ∆ Power Amplifier
نویسنده
چکیده
In this paper a reconfigurable switched-current sigma delta modulator for power amplifier is shown, which is a suitable topology to save energy and integrated area in portable applications. Results have shown the correct operation of a 1.8V, 0.18μm CMOS reconfigurable switched-current sigma delta modulator with 11bits dynamic range within 1MHz and 7.8bits within 3.8MHz bandwidth.
منابع مشابه
A Sub-µW Tuneable Switched-Capacitor Amplifier-Filter for Neural Recording Using a Class-C Inverter
A two stage sub-µW Inverter-based switched-capacitor amplifier-filter is presented which is capable of amplifying both spikes and local field potentials (LFP) signals. Here we employ a switched capacitor technique for frequency tuning and reducing of 1/f noise of two stages. The reduction of power consumption is very necessary for neural recording devices however, in switched capacitor (SC) cir...
متن کاملA Low-Voltage, Low-Power, Two-Stage Amplifier for Switched-Capacitor Applications in 90 nm CMOS Process
Abstract- A novel low-voltage two-stage operational amplifier employing resistive biasing is presented. This amplifier implements neutralization and correction common mode stability in second stage while employs capacitive dc level shifter and coupling between two stages. The structure reduces the power consumption and increases output voltage swing. The compensation is performed by simple mill...
متن کاملReconfigurable Switched-Capacitor ΔΣ Modulator Topology Design
In this paper, a methodology for designing reconfigurable discrete-time ∆Σ modulator topologies is proposed. Topologies are generated from a set of all possible topologies expressed by a generic topology, and optimized for minimizing the complexity of the topologies, maximizing the topology robustness with respect to circuit nonidealities, and minimizing total power consumption. The paper prese...
متن کاملA 300-mV ∆Σ Modulator Using a Gain-Enhanced, Inverter-Based Amplifier for Medical Implant Devices
An ultra-low-voltage low-power switched-capacitor (SC) delta-sigma (∆Σ) modulator running at a supply voltage as low as 300 mV is presented for biomedical implant devices, e.g., cardiac pacemakers. To reduce the supply voltage, an inverter-based amplifier is used in the integrators, whose DC gain and gain-bandwidth (GBW) are boosted by a simple current-mirror output stage. The full input-feedfo...
متن کاملA Voltage-Mode Switched-Capacitor Bandpass ∆Σ Modulator
A novel fourth-order voltage-mode switched-capacitor bandpass ∆Σ modulator, using direct-charge-transfer pseudo-N-path resonators, is described. This modulator is insensitive to component mismatches and finite opamp bandwidth, and is also less sensitive to finite opamp gain than previous bandpass ∆Σ data converters. It is therefore suitable for high-speed communications applications.
متن کامل