介紹一個二代的CMOS電流控制傳輸器，以及其在可調式中頻帶通濾波器之應用。這電流傳輸器的高頻及可控制特性，使得帶通濾波器的中心頻率可調範圍介於55MHz ~ 410MHz之間，可適用於200MHz ~ 300MHz的中頻濾波器。此濾波器之Q值亦可調，最大值可達800。

A second-generation CMOS current controlled conveyor (CCCII) and a tunable IF bandpass filter based on the CCCII are developed. The high frequency property and the control ability of the current conveyor makes the bandpass filter tunable in the range between 55MHz~410MHz, which is suitable for the IF filter application that is around 200MHz~300MHz. The Q-factor is also tunable and has a maximum value up to 800.

List of Contents
I.Introduction 1

II. Conventional Current Conveyors 3

A. Second Generation Current Conveyor 3

B. CCII in Practice 5

C. Translinear Implementation of CCII+ 6

D. Previous Current Controlled Conveyor 8

III. CMOS Current Controlled Conveyor 11

A. Circuit Description and Analysis 11

B. Simulation Results 14

IV. Second Order Bandpass Filter 23

A. Parallel RLC Circuit 23

B. Current-Controlled Active Inductance 24

C. Negative Impedance Converter 26

D. CCCII+ Bandpass Filter Design 27

1. Circuit Description and Analysis 27

2. Tuning 27

3. Q Tuning 28

E. Practical Inductance, NIC and Bandpass Filter 29

F. Simulation results 32

V.Conclusion 35

Reference 36

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