SHORT PULSE GENERATING CIRCUIT

• US 20190326889A1
• Filed: 02/19/2019
• Published: 10/24/2019
• Est. Priority Date: 04/24/2018
• Status: Active Grant

• Current Assignee: Avision, Inc.
• Original Assignee: Avision, Inc.
• Inventors: WANG, Yu-Lang, CHEN, Hsing-Lu, PAN, Chun-Hung
• Granted Patent: US 10,536,137 B2
• Time in Patent Office: Days
• CPC Class Codes: H03K 3/033 Monostable circuits
• CPC Class Codes: H03K 3/037 Bistable circuits
• CPC Class Codes: H03K 5/13 Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals

Abstract

A short pulse generating circuit including a pulse generating circuit, an actuation control circuit and a delay control circuit is provided. The pulse generating circuit is electrically coupled to a switch, which is coupled to a power. When the power is turned on, the power causes the pulse generating circuit to generate a long pulse. The actuation control circuit is electrically coupled to the power and the pulse generating circuit. When the power is turned on, the actuation control circuit controls a voltage level of each output of the pulse generating circuit to a fixed value. The delay control circuit is electrically coupled to the pulse generating circuit. When the switch is turned on, the power controls the delay control circuit to change the voltage level of each output of the pulse generating circuit to generate a short pulse output.

Claims

1. A short pulse generating circuit, comprising:

a pulse generating circuit electrically coupled to a switch, wherein the switch is coupled to a power, and when the power is turned on, the power causes the pulse generating circuit to generate a long pulse;

an actuation control circuit electrically coupled to the power and the pulse generating circuit, wherein when the power is turned on, the actuation control circuit controls a voltage level of each output of the pulse generating circuit to a fixed value; and

a delay control circuit electrically coupled to the pulse generating circuit, wherein when the switch is turned on, the power controls the delay control circuit to change the voltage level of each output of the pulse generating circuit to generate a short pulse output.

2. The short pulse generating circuit according to claim 1, wherein the pulse generating circuit comprises a D flip-flop, which comprises a data input end, a data output end, a pulse control end, a data erase end and a preset control end.

3. The short pulse generating circuit according to claim 2, wherein the data erase end is electrically coupled to a first resistor and a first capacitor both disposed in the actuation control circuit, and after the power is turned on, the first resistor and the first capacitor perform charging and cause the voltage level of each output of the pulse generating circuit to the fixed value.

4. The short pulse generating circuit according to claim 2, wherein the data erase end is electrically coupled to a second resistor and a second capacitor both disposed in the delay control circuit, and when the switch is turned on, the power controls the delay control circuit to adjust a charging time of the second resistor and the second capacitor and a discharging time of the first resistor and the first capacitor to generate the short pulse output.

5. The short pulse generating circuit according to claim 4, wherein the delay control circuit adjusts the charging time of the second resistor and the second capacitor and the discharging time of the first resistor and the first capacitor through a transistor.

6. The short pulse generating circuit according to claim 4, wherein the charging time of the second resistor and the second capacitor determines a duration of the short pulse output.

7. The short pulse generating circuit according to claim 1, wherein a duration of the long pulse is larger than 150 milliseconds.

8. The short pulse generating circuit according to claim 1, wherein a duration of the short pulse output is smaller than 40 milliseconds.

9. The short pulse generating circuit according to claim 1, wherein when the switch is turned on, the power is provided to the delay control circuit.

10. The short pulse generating circuit according to claim 1, wherein the switch is a press key.