Title:
PEAK CUT CIRCUIT
Document Type and Number:
Japanese Patent JP2016100850
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a peak cut circuit capable of achieving an output waveform that is peak-cut at a reference voltage even when a load is drastically changed.SOLUTION: A peak cut circuit comprises: a first operational amplifier circuit that receives an AC input signal, and at whose output side a load is connected without interposing an impedance; and a second operational amplifier circuit that has a first operational amplifier for comparing an output voltage of the first operational amplifier circuit with a reference voltage when the output voltage is in a positive half cycle, and a second operational amplifier for comparing the output voltage of the first operational amplifier circuit with the reference voltage when the output voltage is in a negative half cycle. In addition, the peak cut circuit comprises a feedback circuit that, when the output voltage is larger than the reference voltage in the positive or negative half cycle, adds a positive or negative voltage depending on the difference between them to the input signal inputted to the first operational amplifier circuit. Due to this feedback circuit, during a time period when an absolute value of the output voltage of the first operational amplifier circuit becomes larger than the reference voltage, the output voltage is cut off.SELECTED DRAWING: Figure 3
More Like This:
| JPS5890723 | [Title of the device] Limit circuit |
| JP2009033462 | VOLTAGE LIMITER FOR SIGNAL TRANSMISSION PATH |
Inventors:
TAKADA TOMOAKI
Application Number:
JP2014238336A
Publication Date:
May 30, 2016
Filing Date:
November 26, 2014
Export Citation:
Assignee:
SANSHA ELECTRIC MFG CO LTD
International Classes:
H03G11/02; H03K5/08; H03K7/08
Domestic Patent References:
| JPS5552618A | 1980-04-17 | |||
| JPS6292508A | 1987-04-28 | |||
| JPH0310413A | 1991-01-18 | |||
| JPS6218103A | 1987-01-27 | |||
| JPS6370231U | 1988-05-11 |
Foreign References:
| US4611158A | 1986-09-09 |
Attorney, Agent or Firm:
Kaede International Patent Office
Previous Patent: Relay device
Next Patent: Radio communication equipment, a synchronization method, and a program
Next Patent: Radio communication equipment, a synchronization method, and a program