Amplifiers – With semiconductor amplifying device – Including current mirror amplifier
Patent
1990-07-23
1991-10-15
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including current mirror amplifier
323315, H03F 304
Patent
active
050577921
ABSTRACT:
The invention relates to a current mirror circuit (28) comprising: an input node (29); a first simple current mirror (30) of a first type, such as pnp bipolar technology, having an input coupled to said input node (29) and an output; a second simple current mirror (32) of a second semiconductor type, such as npn bipolar technology, having an input coupled to said output of said first simple current mirror and an output; a third simple current mirror (34) of said first semiconductor type having an input coupled to said output of said second simple current mirror and an output coupled to said input node (29); and an output node (31) coupled to said second simple current mirror (32) so as to receive the sum of the input and output currents of said second simple current mirror flowing in a common terminal thereof.
REFERENCES:
patent: 4339729 (1982-07-01), Jason et al.
Atkins Robert D.
Motorola Inc.
Mullins James B.
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