Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Patent
1994-12-01
1996-02-13
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
327112, 327560, 327561, 327575, 327576, 327309, 330255, 330257, 323315, 323316, H03K 10, G06G 712, H03G 345, G05F 316
Patent
active
054914370
ABSTRACT:
An amplifier circuit (10) is provided. Amplifier (10) has an amplifier stage (14) that is coupled to control an output stage (18). Output stage (18) includes a sourcing circuit (20) and a sinking circuit (22). Output stage (18) also includes a mirror circuit (42) that is coupled to an output of amplifier stage (14). Output stage (18) also includes a current balancing circuit (30) coupled to mirroring circuit (42) and sourcing circuit (20). Mirroring circuit (42) draws current from balancing circuit (30) in response to a first predetermined output from amplifier stage (14) such that balancing circuit (30) causes an insignificant current to flow in sourcing circuit (20). Thus amplifier (10) operates to sink current from an external load (12). Alternatively, mirroring circuit (42) may draw an insignificant current from balancing circuit (30) in response to a second predetermined output of the amplifier stage (14). This causes a significant current flow in sourcing circuit (20).
REFERENCES:
patent: 4612452 (1986-09-01), Stefani et al.
patent: 4827158 (1989-05-01), Matsumura
patent: 5144259 (1992-09-01), Yoshida
patent: 5327100 (1994-07-01), Stockstad et al.
"Motorola Linear/Interface Devices" Motorola pp. 2-232, 2-78, 2-258 and 2-295.
Corsi Marco
Rincon Gabriel A.
Salamina Nicolas
Brady, III W. J.
Callahan Timothy P.
Donaldson R. L.
Hashim Paul C.
Phan Trong
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