三、如下圖所示之電路,
(一)此反饋電路為何種拓樸(topology)之反饋電路?(5 分)其中R1 = 10 kΩ、R2 = 100 kΩ、R3 = 100 kΩ、R4 = 50 kΩ、R5 = 50 kΩ、gm = 2 mA/V,請求出