2024年3月25日发(作者：暨凌寒)
专利内容由知识产权出版社提供
专利名称：SECONDARY ACTIVE BAND PASS FILTER
发明人：KATSUMATA YASUSHI
申请号：JP6461981
申请日：19810428
公开号：JPS57180220A
公开日：19821106
摘要：PURPOSE:To control a Q and a pass band center frequency from a remote
location, by feeding back an output of the 3rd and 4th amplifiers respectively to the
input of the 1st and 2nd amplifiers through the series connection of the 1st-4th
amplifiers, and supplying a control voltage for the Q and time constant.
CONSTITUTION:Amplifiers A1'-A4' in series connection are constituted respectively with
a noninverting amplifier 18 for voltage controlled variable gain having input resistors 11,
13, 16 and 17, an inverting amplifier 19, and noninverting integrators 20 and 21 for
voltage controlled variable time constant, an input signal is applied to a terminal T1, an
output of the integrator 20 is connected to an output terminal T2 and fed back to the
input of the amplifier 18 via a resistor 12. In the amplifier 19, the output signal is fed back
to the inverting input via a resistor 15 and the noninverting input is grounded. Further,
the output of the integrator 21 is fed back to the inverting input of the amplifier 19 via a
resistor 14. A Q control DC voltage EQ is supplied to a terminal TQ of the amplifier 18
and a time constant control DC voltage Ef is supplied from a terminal Tf to the
integrators 20 and 21. The Q and the pass band center frequency can be controlled with a
remote control by changing voltages EQ and Ef.
申请人：SONY KK
更多信息请下载全文后查看
2024年3月25日发(作者：暨凌寒)
专利内容由知识产权出版社提供
专利名称：SECONDARY ACTIVE BAND PASS FILTER
发明人：KATSUMATA YASUSHI
申请号：JP6461981
申请日：19810428
公开号：JPS57180220A
公开日：19821106
摘要：PURPOSE:To control a Q and a pass band center frequency from a remote
location, by feeding back an output of the 3rd and 4th amplifiers respectively to the
input of the 1st and 2nd amplifiers through the series connection of the 1st-4th
amplifiers, and supplying a control voltage for the Q and time constant.
CONSTITUTION:Amplifiers A1'-A4' in series connection are constituted respectively with
a noninverting amplifier 18 for voltage controlled variable gain having input resistors 11,
13, 16 and 17, an inverting amplifier 19, and noninverting integrators 20 and 21 for
voltage controlled variable time constant, an input signal is applied to a terminal T1, an
output of the integrator 20 is connected to an output terminal T2 and fed back to the
input of the amplifier 18 via a resistor 12. In the amplifier 19, the output signal is fed back
to the inverting input via a resistor 15 and the noninverting input is grounded. Further,
the output of the integrator 21 is fed back to the inverting input of the amplifier 19 via a
resistor 14. A Q control DC voltage EQ is supplied to a terminal TQ of the amplifier 18
and a time constant control DC voltage Ef is supplied from a terminal Tf to the
integrators 20 and 21. The Q and the pass band center frequency can be controlled with a
remote control by changing voltages EQ and Ef.
申请人：SONY KK
更多信息请下载全文后查看