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CMOS current mirrors with reduced input and output voltage requirements

CMOS current mirrors with reduced input and output voltage requirements

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© IEE
Published

A CMOS current mirror with lower than VDS(sat) input voltage requirement is presented. It is shown that the structure can be modified to provide cascode-type output resistance for output voltages even lower than 2VDS(sat). The topology of the proposed current mirror allows low distortion operation from a single 1.5 V supply, which makes it attractive for low-voltage applications.

Inspec keywords: electric distortion; CMOS analogue integrated circuits; VLSI; amplifiers

Other keywords: CMOS current mirrors; input voltage; 1.5 V; low distortion operation; VLSI; analogue ICs; output voltage; cascode-type output resistance; low-voltage applications

Subjects: CMOS integrated circuits; Amplifiers

References

    1. 1)
      • Bruun, E., Shah, P.: `Dynamic range of low-voltage cascode current mirrors', Proc. ISCAS, 1995, 2, p. 1328–1331.
    2. 2)
      • Ramirez-Angulo, J.: `Low-voltage current mirrors for built-in current sensors', Proc. ISCAS, 1994, 5, p. 529–532.
    3. 3)
      • J. Babanezhad , R. Gregorian . A programmable gain/lost circuit. IEEE J. Solid-State Circuits , 1082 - 1090
    4. 4)
      • Blalock, B., Allen, P.: `A low-voltage, bulk-driven MOSFET current mirror for CMOS technology', Proc. ISCAS, 1995, 3, p. 1972–1975.
    5. 5)
      • P. Crawley , G. Roberts . High-swing MOS current mirror with arbitrarily high output resistance. Electron. Lett. , 4 , 361 - 363
    6. 6)
      • Nairn, D.: `Amplifiers for high speed current-mode sample-and-hold circuit', Proc. ISCAS, 1992, 4, p. 2045–2048.
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