Second generation switched-current signal processing

Switched-current filter structure for synthesizing arbitrary characteristics based on follow-the-leader feedback configuration

“…Herein, M i is symbolized by black box for generality, and represents the elementary current memory, which samples input current on phase ϕ i and sustains on the next phase. Simply, M i can be realized by an NMOS transistor with associated switch closed on phase ϕ i [10], the so-called second generation SI memory cell. But, for cancelling non-ideal behaviour, several enhancement techniques such as cascode and S 2 I can be used [10][11][12][13][14][15][16].…”

“…Simply, M i can be realized by an NMOS transistor with associated switch closed on phase ϕ i [10], the so-called second generation SI memory cell. But, for cancelling non-ideal behaviour, several enhancement techniques such as cascode and S 2 I can be used [10][11][12][13][14][15][16]. Particularly, when S 2 I technique is selected to realize M i and J, Fig.1(a) can be specialized to the structure used in [17,18].…”

“…Also, SI filter has been considered as an alternative to switched-capacitor (SC) filter in mixed signal systems, owing to the characteristic of compatibility with digital VLSI technology. To date, several competitive SI basic cells have been presented [10][11][12][13][14][15][16]. However, the generation of SI filter structure has not been investigated well so far, which has greatly impeded the widespread application of SI technique.…”

Realization of wavelet transform using switched-current filters

“…For example, SC circuit is not compatible with standard digital VLSI processing since the need for linear floating capacitors leads to the extra fabrication step, e.g. double polysilicon [18][19][20].…”

A low power high performance switched-current multiplier

“…1 is a SI memory cell, for which several solutions exist [1][2][3]. The application of the accurate SI memory cell of Fig.…”