Feature: Electronic design


second stage’s forward-path transimpedance gain is achieved by adopting the compound arrangement of an emitter-follower driving a common emitter stage as shown in Figure 1. By this method, the increase in the second stage’s forward-path transimpedance gain is at least twice that attainable with a cascode. For this reason, and because of its superlative linearity, the simple circuit of Figure 1 has not been improved upon in any substantive way, especially of domestic consumer applications.


Figure 9: Contrary to popular opinion, capacitors C2 and C3 do not provide Miller minor loop negative feedback to any significant degree


Figure 10: Novel two-stage amplifier consisting of differential folded-cascode TAS and TIS


52 December 2021/January 2022 www.electronicsworld.co.uk


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66