Title:
【発明の名称】真空管増幅器相当の半導体装置
Document Type and Number:
Japanese Patent JP2834167
Kind Code:
B2
Abstract:
A distortion synthesizer having a transformerless filter of a defined bandwidth and providing circuitry for narrowing of the bandwidth filter as a function of the amplitude of the input signal. This includes an input amplifier having a limiter connected between the input amplifier and the band pass filter with feedback between the output of the band pass filter and the input of the amplifier. The limiter is actuated at a given input signal to limit the amplitude and thereby reduce the feedback narrowing the frequency response. A bias shifter connected to the input of the amplifier asymmetrically transmits the input signal and in combination with the limiter produces even harmonics. A feed forward embodiment is also disclosed. Diode structure provided in an output stage brings flyback into the audible range allowing the flyback voltages to exceed the power supply voltages. The time constant of the bias shifter is sufficiently long to prolong the bias shifting to allow attack time for the note.
Inventors:
PURITSUCHAADO ERITSUKU KEE
Application Number:
JP50326788A
Publication Date:
December 09, 1998
Filing Date:
March 23, 1988
Export Citation:
Assignee:
PURITSUCHAADO ERITSUKU KEE
International Classes:
H03G5/02; G10H1/16; G10H3/18; H03F1/32; H03G7/00; H03G11/04; (IPC1-7): G10H1/16; H03G11/04
Domestic Patent References:
| JP6250899A | ||||
| JP5816293A | ||||
| JP5480733U | ||||
| JP5630392U |
Attorney, Agent or Firm:
Toshio Okamura