CMOS Implementations of Current Conveyors - Current Conveyors: Variants, Applications and Hardware Implementations - page 75

+V DD

V b1 M 5

M 6

M 20

M 11

M 10

Y M 9

M 8

X Z

M 7

M 12

M 19

M 21

V b3

V b2

M 15 M 18

M 14

−V SS

Fig. 4.15 CMOS CCII proposed by Arslan et al. [ 63 ]

that the voltage gain of the circuit is 1.01, current gain is 0.99 and the corresponding
3-dB bandwidths are about 810 MHz and 915 MHz respectively. The values of the
parasitic impedances were found to be R x ¼ 9.6 Ω and R z ||C z ¼ 147 k Ω ||33.5 fF.

Concluding Remarks
In this chapter, we have presented a variety of CMOS CC architectures
chosen from a large number of circuits [ 1 - 67 , 69 ] reported in the literature.
It must be pointed out that a very good coverage of a number of CMOS CCs
till 2003 has already been dealt with in the topic [ 68 ] by Ferri and Guerrini
hence; we have mainly focused upon developments not included in [ 68 ]or
those taken place after 2003. Furthermore, only a selected works have been
included and the interested readers are referred to the references of [ 1 - 69 ]
given in the end of this chapter as well as those in the supplementary list of
references given in Appendix-I. CMOS/BiCMOS implementation of the CCs
is an area which has continued to attract the attention of researchers over the
past two decades and continues to do so even now.

References

1. Sedra AS, Roberts GW, Gohh F (1990) The current conveyor: history, progress and new
results. IEE Proc Circ Devices Syst 137:78-87
2. Liu SI, Tsao HW, Wu J, Lin TK (1990) MOSFET capacitor filters using unity gain CMOS
current conveyors. Electron Lett 26:1430-1431
3. Liu SI, Tsao HW, Wu J (1991) CCII-based continuous-time filters with reduced gain-
bandwidth sensitivity. IEE Proc Circ Devices Syst 138:210-216
4. Chen JJ, Chen CC, Tsao HW, Liu SI (1991) Circuit-mode oscillators using single current
follower. Electron Lett 27:2056-2059