TWM484863U - Sequential pulse signal generator - Google Patents

Abstract

A generator for generating a sequential pulse signal, includes a voltage/current transfer block, a current amplifier, a charge/discharger a comparator module an output block. The voltage/current transfer block is used to transfer a voltage into a current. The voltage/current transfer block coupled to the current amplifier and the output block is used to generate a charge/discharge control signal in response to said current. The charger/discharger coupled to the compactor module and the output block. The comparator is used to generate a comparator signal in response to said charger/discharger signal. An output of the output block is coupled to the sequential pulse signal.

Description

Continuous pulse signal generator

The present invention relates to a pulse wave generator, and more particularly to a pulse wave generator for converting an input voltage into a continuous pulse wave signal.

Continuous pulse wave generators have been widely used in applications that use an integrated circuit for generating an electronic pulse signal using a trigger of a clock signal. 1 shows a conventional continuous pulse generator 1 comprising a delay unit 12 and a NAND logic gate 11. The delay unit 12 is formed by serially connecting an odd number of inverters to invert an input signal Vin and delay a specific internal time to form a negative logic operation delay signal Vd. . After receiving the delay signal Vd and the input signal Vin, the NAND logic gate 11 outputs an output signal Vout through a NAND operation. Since the pulse width of the output signal Vout is related to the number of inverters INV in the delay unit 12. Therefore, the pulse width of the output signal Vout will be related to the number of inverters INV and cannot be adjusted via an external setting.

Figure 2 (a) shows another conventional continuous pulse generator 2, which uses a voltage source Vdc to alternately charge capacitors C1 and C2 via resistors R4 and R6, respectively, and alternately via resistors R4 and R3 and R6. And R7 discharges the capacitors C1 and C2, respectively, by controlling the turn-on or turn-off of the switching elements Q1 and Q2 to stably generate the symmetrical pulse as shown in FIG. 2(b) at Vout1 and Vout2. Wave signal. Since the pulse widths of the output signals Vout1 and Vout2 are related to the values of the capacitance and the resistance. Therefore, the pulse widths of the output signals Vout1 and Vout2 will be fixed.

In addition, U.S. Patent No. 6,121,803 discloses a pulse generator which rises from 0 V to a predetermined value according to a voltage source Vcc and opens or resets a power source to stably generate a pulse wave signal. When the rising slope of the voltage source Vcc is poorly controlled, the pulse width will be changed. In addition, when the voltage source Vcc is raised from 0V to a preset value (5V or 3V), the required time takes several microseconds or longer, and thus the operation in which the pulse width is less than microseconds cannot be satisfied. Furthermore, if a continuous pulse wave of a desired pulse width is to be generated, conventional techniques require many inverters or transistors, which will increase Add complexity and cost to circuit design.

In order to solve the above technical problem, the present invention provides a continuous pulse wave signal generator for converting an input voltage into a continuous pulse wave signal, comprising: a detecting module, a current amplifying module, a charging/discharging device, A comparison module and an output module. The detection module is configured to convert an input voltage into an input current; the current amplification module is coupled to the charge/discharger, and generates the continuous pulse signal and a charge/discharge control signal to respond to the input current The charging/discharging device is coupled to the comparison module and the output module; the comparison module is coupled to the output module and generates a comparison signal to respond to the charging/discharging control signal; and the continuous The pulse signal is outputted by one of the output modules.

The invention also provides a continuous pulse wave signal generator for converting an input resistance into a continuous pulse wave signal, comprising: a detection module, a current amplification module, a charge/discharge device, a comparison module and a Output module. The detection module is configured to convert an input resistance into an input current; the current amplification module is coupled to the charge/discharger, and generates the continuous pulse signal and a charge/discharge control signal to respond to the input current The charging/discharging device is coupled to the comparison module and the output module; the comparison module is coupled to the output module and generates a comparison signal to respond to the charging/discharging control signal; and the continuous The pulse signal is outputted by one of the output modules.

1, 2‧‧‧Knowledge pulse generator

12‧‧‧Delay unit

11‧‧‧NAND Logic Gate

300‧‧‧Continuous Pulse Signal Generator

301‧‧‧Test module

302‧‧‧Current amplification module

303‧‧‧Charge/discharger

304‧‧‧Comparative Module

305‧‧‧Output module

310‧‧‧resistance

311‧‧‧Operational Amplifier

312, 313, 314‧‧‧ MOSFET

315‧‧‧ switch

316‧‧‧ Capacitance

317, 318‧‧‧ comparator

319‧‧‧SR positive and negative

320‧‧‧Continuous pulse signal

400‧‧‧Continuous Pulse Signal Generator

401‧‧‧Test module

402‧‧‧Current amplification module

403‧‧‧Charge/discharger

404‧‧‧Comparative Module

405‧‧‧Output module

410‧‧‧Input resistance

411‧‧‧Operational Amplifier

412, 413, 414‧‧‧ MOSFET

415‧‧‧ switch

416‧‧‧ Capacitance

417, 418‧‧‧ comparator

419‧‧‧SR positive and negative

420‧‧‧Continuous pulse signal

The technical method of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments to make the features and advantages of the present invention more obvious. Wherein: Figure 1 (a) shows a schematic diagram of a conventional continuous pulse wave signal generator.

Fig. 1(b) is a diagram showing the output waveform of another conventional continuous pulse wave signal generator.

Figure 2 (a) is a schematic diagram of another conventional continuous pulse wave signal generator.

Fig. 2(b) is a diagram showing the output waveform of another conventional continuous pulse wave signal generator.

3 is a schematic circuit diagram of a continuous pulse wave signal generator block in accordance with an embodiment of the present invention.

4 is a schematic circuit diagram of a continuous pulse wave signal generator block in accordance with another embodiment of the present invention.

The embodiments of the present invention will be described in detail below. While the invention will be described in conjunction with the embodiments, it is understood that the invention is not limited to the embodiments. Rather, the invention is to cover various modifications, equivalents, and equivalents of the invention as defined by the scope of the appended claims.

In addition, in the following detailed description of the embodiments of the invention However, it will be understood by those of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail in order to facilitate the invention.

The following detailed description is a symbolic representation of procedures, logic blocks, steps, and other operations that represent data bits in a computer memory. These descriptions and representations are the most effective way for those of ordinary skill in the field of data processing technology to convey the substance of their work. In the present invention, a program, a logic block, a step or the like is considered to produce a desired result in a self-consistent sequence of steps or instructions.

A pulse wave generator for a continuous pulse wave signal is provided in accordance with an embodiment of the present invention. Advantageously, the continuous pulse signal generated by the pulse generator can have a desired pulse width.

FIG. 3 shows an illustrative schematic circuit diagram of a pulse signal generator 300 in accordance with an embodiment of the present invention. The continuous pulse signal generator 300 includes a detection module 301, a current amplification module 302, a charge/discharger 303, a comparison module 304, and an output module 305. The detecting module 301 is configured to convert a current signal by an input voltage. In one embodiment, the detection module 301 is comprised of a MOSFET 312, an operational amplifier 311, and a resistor 310. The current amplification module 302 is a current mirror formed by the MOSFET 313 and the MOSFET 314. In one embodiment, the MOSFET 313 and MOSFET 314 form a current mirror whose amplification can be determined by the aspect ratio of the channels of MOSFET 313 and MOSFET 314. The charge/discharger 303 is composed of a capacitor 316 in parallel with the switch 315. In one embodiment, the comparison module 304 is a window comparator composed of the comparator 317 and the comparator 318. In one embodiment, the output module 305 is an SR flip-flop. After receiving the input voltage Vin via the terminal IN, the pulse signal generator 300 generates a continuous pulse signal Vout at the terminal OUT.

In the pulse signal generator 300, the non-inverting input terminal of the operational amplifier 311 Receiving an input voltage Vin. In an embodiment, the input voltage Vin is 0V~5V. Therefore, the inverting input voltage of the operational amplifier 311 is also Vin. Current I310 flows through resistor 310 to ground. The current I1 flowing through the metal oxide semiconductor field effect transistor (MOSFET) 313 and the MOSFET 312 is equal to the current I310. Since MOSFET 313 and MOSFET 314 form a current mirror, current I2 flowing through MOSFET 314 is also equal to current I310. The output of comparator 317 and the output of comparator 318 are coupled to the S input and R input of SR flip flop 319, respectively. The inverting input of the comparator 317 receives the preset voltage V1. The non-inverting input of comparator 318 receives a preset voltage V2. In an embodiment, V1 is greater than V2 and V2 is greater than zero. Capacitor 316 is coupled between MOSFET 314 and ground and has a common node coupled between one end and a non-inverting input of comparator 317 and an inverting input of comparator 318. The Q output of the SR flip-flop 319 is coupled to the S input of the switch 315 and the SR flip-flop 319. Switch 315 is in parallel with capacitor 316. The on state of switch 315 (eg, on/off) is determined by the Q output of SR flip-flop 319. In an embodiment, the switch 315 is a MOSFET.

The initial voltage across capacitor 316 is approximately zero, less than V2. Therefore, the R input terminal of the SR flip-flop 319 receives the digital signal 1 output from the comparator 318. The Q output of SR flip-flop 319 is set to digital signal 0, which turns off switch 315. When switch 315 is turned off, as capacitor 316 is charged by current I2, the voltage across capacitor 316 rises. When the voltage across the capacitor 316 is greater than V1, the S input of the SR flip-flop 319 receives the digital signal 1 output by the comparator 317. The Q output of the SR flip-flop 319 is set to digital signal 1, which turns on the switch 315. When switch 315 is turned on, as capacitor 316 is discharged via switch 315, the voltage across capacitor 316 decreases. When the voltage across capacitor 316 drops below V2, comparator 318 outputs digital signal 1, and the Q output of SR flip-flop 319 is set to digital signal 0, which turns off switch 315. Capacitor 316 is in turn charged by current I2. As such, the pulse signal generator 300 generates the continuous pulse signal 320 via the above process. Controlling the magnitude of the preset voltages V1 and V2 controls the pulse width of the continuous pulse signal. The continuous pulse signal 320 is simultaneously transmitted to the S input of the SR flip-flop 319, which includes a series of pulse signals 320 at the Q output of the SR flip-flop 319. Therefore, by controlling the magnitude values of the preset voltages V1 and V2, the present invention can relatively easily generate continuous pulse waves having any desired pulse width.

4(a) shows a pulse signal generator 400 according to another embodiment of the present invention. An illustrative schematic circuit diagram. The continuous pulse wave signal generator 400 includes a detection module 401, a current amplification module 402, a charge/discharger 403, a comparison module 404, and an output module 405. Elements in Figure 4 that are numbered the same as in Figure 3 have similar functions and will not be repeatedly described herein for the sake of brevity. The detection module 401 is configured to convert a current signal by an input resistor. In one embodiment, the detection module 401 is comprised of a MOSFET 412, an operational amplifier 411, and a resistor 410. The current amplification module 402 is a current mirror formed by the MOSFET 413 and the MOSFET 414. In one embodiment, the MOSFET 413 and MOSFET 414 form a current mirror whose amplification can be determined by the aspect ratio of the channels of MOSFET 413 and MOSFET 414. Charge/discharger 403 is comprised of capacitor 416 in parallel with switch 415. In one embodiment, the comparison module 304 is a window comparator composed of the comparator 417 and the comparator 418. In an embodiment, the output module 405 is an SR flip-flop. After the pulse signal generator 400 receives an input resistor 410 via the terminal IN, a continuous pulse signal Vout is generated at the terminal OUT.

In the pulse signal generator 400, the non-inverting input of the operational amplifier 411 receives a predetermined input voltage Vint. In an embodiment, the preset input voltage Vint is 5 volts. In another embodiment, the preset input voltage Vint is 3.3 volts. Therefore, the inverting input voltage of the operational amplifier 411 is also Vin. Current I410 flows through input resistor 410 to ground. In one embodiment, the input resistance 410 is 1 仟 ohms to 100 仟 ohms. The current I1 flowing through the metal oxide semiconductor field effect transistor (MOSFET) 413 and the MOSFET 412 is equal to the current I410. Since MOSFET 413 and MOSFET 414 form a current mirror, current I2 flowing through MOSFET 414 is also equal to current I410. The output of comparator 417 and the output of comparator 418 are coupled to the S input and R input of SR flip-flop 419, respectively. The inverting input of the comparator 317 receives the preset voltage V1. The non-inverting input of comparator 418 receives a predetermined voltage V2. In an embodiment, V1 is greater than V2 and V2 is greater than zero. Capacitor 416 is coupled between MOSFET 414 and ground and has a common node coupling between one end and a non-inverting input of comparator 417 and an inverting input of comparator 418. The Q output of the SR flip-flop 419 is coupled to the S input of the switch 415 and the SR flip-flop 419. Switch 415 is coupled in parallel with capacitor 416. The on state of switch 415 (eg, on/off) is determined by the Q output of SR flip-flop 419. In an embodiment, the switch 415 is a MOSFET.

The initial voltage across capacitor 416 is approximately zero, less than V2. Therefore, the R input terminal of the SR flip-flop 419 receives the digital signal 1 output from the comparator 418. The Q output of SR flip-flop 419 is set to digital signal 0, which turns off switch 415. When switch 415 is turned off, as capacitor 416 is charged by current I2, the voltage across capacitor 416 rises. When the voltage across the capacitor 416 is greater than V1, the S input of the SR flip-flop 419 receives the digital signal 1 output by the comparator 417. The Q output of the SR flip-flop 419 is set to a digital signal 1, which turns on the switch 415. When switch 415 is turned on, as capacitor 416 discharges via switch 415, the voltage across capacitor 416 decreases. When the voltage across capacitor 416 drops below V2, comparator 418 outputs digital signal 1, and the Q output of SR flip-flop 419 is set to digital signal 0, which turns off switch 415. Capacitor 416 is in turn charged by current I2. As such, the pulse signal generator 400 generates a continuous pulse signal 420 via the above process. Controlling the magnitude of the preset voltages V1 and V2 controls the pulse width of the continuous rush signal. The continuous pulse signal 420 is simultaneously transmitted to the S input of the SR flip-flop 419, which includes a series of continuous pulse signals 420 at the Q output of the SR flip-flop 319. Therefore, by controlling the magnitude values of the preset voltages V1 and V2, the present invention can relatively easily generate continuous pulse waves having any desired pulse width.

The above detailed description and the accompanying drawings are only typical embodiments of the invention. It is apparent that various additions, modifications and substitutions are possible without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood by those of ordinary skill in the art that the present invention may be applied in the form of the form, structure, arrangement, ratio, material, element, element, and other aspects in the actual application without departing from the invention. Changed. Therefore, the embodiments disclosed herein are intended to be illustrative and not restrictive, and the scope of the invention is defined by the scope of the appended claims and their legal equivalents.

300‧‧‧Continuous Pulse Signal Generator

301‧‧‧Test module

302‧‧‧Current amplification module

303‧‧‧Charge/discharger

304‧‧‧Comparative Module

305‧‧‧Output module

310‧‧‧resistance

311‧‧‧Operational Amplifier

312, 313, 314‧‧‧ MOSFET

315‧‧‧ switch

316‧‧‧ Capacitance

317, 318‧‧‧ comparator

319‧‧‧SR positive and negative

320‧‧‧Continuous pulse signal

Claims (10)

A continuous pulse wave signal generator for converting an input voltage into a continuous pulse wave signal, comprising: a detecting module for converting the input voltage into an input current; and a current amplifying module coupled to the first a charging/discharging device and generating the continuous pulse wave signal and a charging/discharging control signal to return the input current; a comparison module coupled to an output module and generating a comparison signal to be charged/discharged And a control signal, wherein the charging/discharging device is coupled to the comparison module and the output module, and the comparison module and the continuous pulse wave signal are outputted by one of the output modules. The continuous pulse wave signal generator of claim 1, wherein the current amplification module is a current mirror. A continuous pulse wave signal generator according to claim 2, wherein a magnification of the current mirror is determined by a channel length to width ratio of one of its internal metal oxide semiconductor field effect transistors (MOSFETs). The continuous pulse wave signal generator of claim 1, wherein the charge/discharger is composed of a capacitor and a switch in parallel. The continuous pulse wave signal generator of claim 1, wherein the comparison module is a window comparator. A continuous pulse wave signal generator for converting an input resistance into a continuous pulse wave signal, comprising: a detection module for converting the input resistance into an input current; and a current amplification module coupled to the a charging/discharging device and generating the continuous pulse wave signal and a charging/discharging control signal to return the input current; a comparison module coupled to an output module and generating a comparison signal to be charged/discharged And a control signal, wherein the charging/discharging device is coupled to the comparison module and the output module, and the comparison module and the continuous pulse wave signal are outputted by one of the output modules. The continuous pulse wave signal generator of claim 6, wherein the current amplification module is a current mirror. A continuous pulse wave signal generator according to claim 7, wherein one of the current mirror magnifications is determined by a channel length to width ratio of one of the internal metal oxide semiconductor field effect transistors. The continuous pulse wave signal generator of claim 6, wherein the charge/discharger is composed of a capacitor and a switch in parallel. The continuous pulse wave signal generator of claim 6, wherein the comparison module is a window comparator.