Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1997-12-10
1999-09-28
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327319, 327437, 326 81, H03L 500
Patent
active
059594900
ABSTRACT:
A translation circuit for mixed logic voltage signals is comprised of a first pair of self-biasing common-mode level shifters for receiving positive and negative polarity input signals respectively of a balanced input signal, each level shifter having a control input for receiving a ratio control signal, and having first level shifter nodes for providing the same polarity output signals, a second pair of self-biasing common-mode level shifters, each connected in parallel with a corresponding variable ratio level shifter, the second pair of level shifters having fixed level shift ratios, a circuit connected to level shifter nodes of the second pair of level shifters for providing and storing a signal which is a sum of voltages appearing at the level shifter nodes, and a circuit for applying the stored signal to the control inputs.
REFERENCES:
patent: 4982111 (1991-01-01), Nakaizumi
patent: 5369313 (1994-11-01), Yoshihara
patent: 5493245 (1996-02-01), Kao et al.
patent: 5825207 (1998-10-01), Ito
Candage Anthony B.
Deliyannides George
Callahan Timothy P.
Luu An T.
PMC-Sierra Ltd.
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