چكيده به لاتين
The Current Mode Instrumentation Amplifiers (CMIAs) based on second generation Current Conveyor (CCII) are widely used in medical instrumentation and signal processing,.. ,and, unlike Voltage Mode Instrumentation amplifiers (VMIA) has bandwidth Independent of gain. In recent years, in order to provide high CMRR, Fully Differential second generation Current Conveyors (FDCCIIs) have been used for the design of these amplifiers to avoid the need for similar resistance. Different methods have been proposed in these years to reduce power consumption in these amplifiers. One of these methods is the proper design of the current conveyor in sub threshold region. Hence, in the fourth chapter of this termination, a new very low voltage, very low power, low Rx, wideband and accurace Fully Differential Second Genaration Current Conveyor (FDCCII) with good PVT in sub-threshold region. The design of the proposed circuit in sub-threshold region decrease significantly power. Also, to reduce the input resistance of the current conveyor (Rx), feedback loops with high gain have been used. In order to optimize, has been considered , the result is a good PVT in the circuit in sub-threshold region. This circuit is simulated by the CADENCE simulator and in 0.18μm TSMC RF technology with a supply voltage of ± 0.4V and a small layout (35.3µm*20.5µm). The results ,respectively, in the pre-layout, pre-layout+MC, post-layout and post-layout+MC are; Rx of 8.47Ω, 10.49Ω, 8.77Ω and 10.69Ω and -3dB bandwidth for voltage (current) signal of 518.8MHz (653.1MHz), 513.85MHz (649.14MHz), 399.1MHz (442.41MHz) and 389.48MHz (439.21MHz). Also, consumed power, DC voltage range and DC current range ,respectively, in pre-layout (post-layout) are 45.14µW (45.08µW), ±300mV and ±13uA. The FDCCII offset voltage are -5.53mV and -5.78mV in pre-layout and post- layout, respectively. Given the Monte Carlo, temperature and corners analysis, it is clear that FDCCII has good PVT. Also, in Chapter 5 of this thesis, a CMIA is presented based on the FDCCII designed in Chapter 4(with Applying changes to improve CMIA parameters), the results of which are as follows: CMRR and CMRR bandwidth of proposed CMIA are 247.28dB and 55.45MHz, respectively. Also, maximum gain and Its bandwidth are 76.11dB and 5.22MHz, respectively. The proposed CMIA power is 7.57uW. . This circuit is simulated by the CADENCE simulator and in 0.18μm TSMC RF technology with a supply voltage of ± 0.4V.
