Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Reexamination Certificate
2005-06-28
2005-06-28
Nguyen, Khanh V. (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
C330S269000, C330S277000, C330S288000
Reexamination Certificate
active
06911866
ABSTRACT:
The invention provides a method for amplification of analog push-pull signals (101a,101b) by means of a push-pull amplifier output stage (100) which has a first output stage transistor (102a) and a second output stage transistor (102b), with first and second analog push-pull signals (101a,101b) being applied to the first and second output stage transistors (102a,102b) and to first and second control transistors (103a,103b), by which means first and second control currents (104a,104b) are controlled, furthermore with the second control current (104b) which is controlled by the second control transistor (103b) being mirrored by means of a current mirror device (105) into a mirrored second control current (104c), with the first control current (104a) being compared with a first reference current, with the mirrored second control current (104c) being compared with a second reference current, with reference voltage levels (107a,107b) which are produced by the comparison processes being logically linked in an AND gate (110), and with a fault signal (111) which is produced by the AND gate (110) being used to drive a limiter transistor (112) in order to limit any inrush current flow through the output stage transistors (102a,102b).
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Maginot Moore & Beck
Nguyen Khanh V.
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