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The paper suggests an novel architecture of the operational amplifier (OA) using the circuit method to increase the high-speed response. It is provided due to special circuit of nonlinear correction and the extension of the active operational range of the input differential stage (DS) of OA. At static current of the common circuit of the source of DS 10 µA the maximum slew rate of OA increases more...
The paper considers the conditions of synthesis of a special compensation circuit (CC) of parasitic capacitance connected with an output of classic transistor stage (TS) from the common ground of the theory of automatic control systems. The purpose of CC is to extend the frequency range of TS, especially at high-resistance loads, including active ones. It is shown that the connected CC should contain...
The paper reviews a circuit method of minimization of the influence of the unity gain frequency (f1) of the operational amplifiers (OA) on the main parameters of the RC-filter (of the selective amplifier, SA) with the Rauch's architecture. It allows increasing the quasi-resonance frequency of SA (ωp), which is realized on OA, decreasing the dependence of ωp and filter quality factor Q upon f1.
The method of increasing (by 5÷10 times) of the voltage transfer ratio (Gain) of the broadband cascode amplifiers (BCA) with the passive load in the form of the relatively low-ohmic resistor (R1=0.5÷1 kOhm) is considered. The effect of the increase of the gain of BCA is provided due to the introduction of a special circuit of the inherent compensation R1. The architectures of BCA on the bipolar and...
The new architecture of the differential stages (DS), that provides the increase of the voltage gain on 1 or 2 orders without using of the classical active loads (current mirrors) on p-n-p transistors is considered. The recommended application field is analog and analog-to-digital circuits with the low supply voltage. The effect of increasing of the gain of DS at relatively low-ohmic resistors of...
The modified method of the increase of the response speed of flash ADCs with the differential input which renders possible to reduce the effect of the parasitic capacitances of active and passive components of the analog sections and also to optimize their gain flatness is reviewed. The additional emitter follower and balancing capacitor are fed into each analog section to extend the bandwidth of...
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