Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1994-07-27
1995-04-04
Kuntz, Curtis
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
330256, 330289, 327513, G06G 710, G06G 712, H03F 345, H03F 304
Patent
active
054040582
ABSTRACT:
A level detecting circuit includes an operational amplifier, a first resistor, a first series circuit of second and third resistors, a fourth resistor, and a second series circuit of fifth and sixth resistors. The operational amplifier receives differential outputs from an AGC detecting circuit as inverting and non-inverting inputs. The first resistor is connected between one differential output of the AGC detecting circuit and the inverting input of the operational amplifier. The first series circuit is inserted in a negative feedback loop between an output of the operational amplifier and the inverting input of the operational amplifier. The fourth resistor is connected between the other differential output of the AGC detecting circuit and the non-inverting input of the operational amplifier. The second series circuit is connected between a bias voltage and the non-inverting input of the operational amplifier. The resistances of the first and fourth resistors and resistances of the second, third, fifth, and sixth are respectively set to be the same, and a temperature coefficient of each of the first, second, fourth, and fifth resistors and a temperature coefficient of each of the third and sixth resistors are set to have the same absolute value and opposite polarities.
REFERENCES:
patent: 3686517 (1972-08-01), Sexton, Jr.
patent: 3808469 (1974-04-01), Raymond et al.
patent: 3912997 (1975-10-01), Asmar
patent: 3973147 (1976-08-01), Yu
patent: 4096382 (1978-06-01), Numata et al.
patent: 4267468 (1981-05-01), Hilliker
patent: 4424461 (1984-01-01), Taguchi et al.
patent: 4611129 (1986-09-01), Ishihara
patent: 4853646 (1989-08-01), Johnson et al.
Kuntz Curtis
NEC Corporation
Tran Sinh
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