Level shifter with boost and attenuation programming

Details Level shifter with boost and attenuation programming Level shifter with boost and attenuation programming

2007-02-27

2007-02-27

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C326S081000

Reexamination Certificate

active

10929214

ABSTRACT:
A level shifter circuit includes a bias module that receives a first voltage value, that generates a second voltage value when an operational frequency of the level shifter circuit is less than a threshold, and that generates a third voltage value when the operational frequency is greater than or equal to the threshold. A programmable gain module generates a fourth voltage value based on the second voltage value when the operational frequency is less than the threshold and based on the third voltage value when the operational frequency is greater than or equal to the threshold. The bias module includes a load module that receives the first voltage value and that generates the second voltage value and a bypass module that receives the first voltage value and that generates the third voltage value. A gain value of the programmable gain module determines a voltage gain of the level shifter circuit.

REFERENCES:
patent: 4868427 (1989-09-01), Fitzpatrick et al.
patent: 4939393 (1990-07-01), Petty
patent: 5682108 (1997-10-01), Min
patent: 6191635 (2001-02-01), Thompson et al.
patent: 6259321 (2001-07-01), Song et al.
patent: 6300802 (2001-10-01), Smetana
patent: 6331803 (2001-12-01), Zheng et al.
patent: 6337586 (2002-01-01), Aizawa
patent: 6483345 (2002-11-01), Whittaker et al.
patent: 6952240 (2005-10-01), Gower et al.
patent: 6958652 (2005-10-01), Kim et al.

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