Back to results
US 2020/0007117 A1Published application
Pulse modulation circuit with high-frequency-limiting function
AssigneeChongqing Paixinruwei Tech Co., Ltd.
InventorFang TANG
Life of this patent
Estimating the term…
Abstract
A pulse modulation circuit with a high-frequency-limiting function, including a comparator, an RS trigger, a switching triode, a NAND gate, a NOR gate, and a charging capacitor. A capacitor charging time is controlled by adjusting a bias current IB1, a bias current IB2, a reference voltage V1, and a reference voltage V2 or adjusting values of capacitors C1 and C2. In this way, a highest output frequency of a pulse generator is limited, so as to reduce hardware system overheads.
Claims5
A pulse modulation circuit with a high-frequency-limiting function, comprising:
- a first level output unit, a second level output unit, a first voltage comparator, an RS trigger, a NAND gate, and a NOR gate, wherein
- an output terminal of the first level output unit is connected to an input terminal of the RS trigger and an input terminal of the NOR gate, and an input terminal of the first level output unit is connected to an output terminal of the RS trigger;
- an output terminal of the second level output unit is connected to an input terminal of the NAND gate, and an input terminal of the second level output unit is connected to an other output terminal of the RS trigger and a voltage pulse frequency output terminal;
- and an other input terminal of the NAND gate is connected to an output terminal of the first voltage comparator, and an output terminal of the NAND gate is connected to an other input terminal of the NOR gate;
- and
- two input terminals of the first voltage comparator are connected to a first periodic input signal and a first reference signal, respectively.
3 more elements
Dependencies are inferred from the claim text.