Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1987-11-09
1989-12-12
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330 69, H03F 345
Patent
active
048870463
ABSTRACT:
A high gain, linear open loop amplifier is shown. The output of a transconductance amplifier (264) is connected to a load resistor (315). A resistive voltage divider network (292,293,294,295) is connected to an input signal conductor (431). The resistor (293) connected across the inputs of the differential amplifier (264) has a very small value compared to the other resistors (292,294,295), thereby providing a very small differential voltage across the inputs to the amplifier (264). The small input voltage, the small output current of the amplifier (264), and the resistance of the load (315) force the amplifier (264) to operate as a linear, open loop amplifier.
REFERENCES:
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patent: 3602832 (1971-08-01), Raymond
patent: 4117304 (1978-09-01), Wodzinski et al.
patent: 4301355 (1981-11-01), Kimbrough et al.
patent: 4349720 (1982-09-01), Makimaa
patent: 4409465 (1983-10-01), Yamamoto et al.
patent: 4427874 (1984-01-01), Tabata et al.
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patent: 4672175 (1987-06-01), Niven
National Semiconductor Data Sheets for LM3524, pp. 1-115 through 1-129, 1980 Linear Databook.
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