CN-116520929-B - Bandgap reference circuit, clock signal generator and power circuit

CN116520929BCN 116520929 BCN116520929 BCN 116520929BCN-116520929-B

Abstract

The present disclosure relates to a bandgap reference circuit, a clock signal generator and a power circuit. A bandgap reference circuit includes a plurality of current sources having different temperature coefficients, a first trimmer, and a mixer. The first trimmer adjusts the amounts of the plurality of currents individually output from each of the plurality of current sources to be equal to each other. The mixer adjusts a polymerization ratio and combines the plurality of currents based on the polymerization ratio.

Inventors

DING ZHONGSHI
Quan Zangen
JIN ZHONGXI
LI YINGGUAN

Assignees

爱思开海力士有限公司

Dates

Publication Date: 20260508
Application Date: 20220809
Priority Date: 20220120

Claims (15)

1. A bandgap reference circuit, the bandgap reference circuit comprising: A plurality of current sources, the plurality of current sources comprising different temperature coefficients; A first trimmer that adjusts an amount of current of one of the plurality of currents respectively output from the plurality of current sources to be equal to an amount of current of another of the plurality of currents; A comparator that compares the regulated current output from the first trimmer with the other current among the plurality of currents, wherein the regulation performed by the first trimmer for the one current among the plurality of currents is monitored at a first temperature based on a comparison result of the comparator, and A mixer that adjusts amounts of current of the plurality of currents to be equal to each other at a second temperature different from the first temperature to determine a polymerization ratio, and combines the plurality of currents based on the polymerization ratio.
2. The bandgap reference circuit of claim 1, wherein the plurality of current sources comprises: a first current source that reduces an amount of current of a first current of the plurality of currents when a temperature increases, and A second current source that increases an amount of current of a second current of the plurality of currents when the temperature increases.
3. The bandgap reference circuit of claim 2, wherein the first current source comprises a plurality of diodes, a plurality of diode-connected transistors or a plurality of bipolar junction transistors, and The second current source outputs a difference between currents flowing through two components having different sizes included in the first current source as a second current.
4. The bandgap reference circuit of claim 2, wherein the first trimmer adjusts the amount of the first current output from the first current source.
5. The bandgap reference circuit of claim 2, Wherein the mixer comprises: A second trimmer that adjusts the amount of current of the first current at the second temperature; a third trimmer that adjusts the amount of current of the second current at the second temperature, and A combiner that combines the outputs of the second trimmer and the third trimmer.
6. The bandgap reference circuit of claim 1, further comprising: And a fourth trimmer that adjusts the amount of current of the current output from the mixer based on a preset reference.
7. A clock signal generator, the clock signal generator comprising: A bandgap reference circuit, the bandgap reference circuit comprising: a first trimmer that adjusts an amount of current of one current among a plurality of currents respectively output from a plurality of current sources having different temperature coefficients to be equal to an amount of current of another current among the plurality of currents; A comparator comparing the regulated current with the other current of the plurality of currents, and A mixer that adjusts the amounts of current of the plurality of currents to be equal to each other at a second temperature to determine a polymerization ratio, and combines the plurality of currents based on the polymerization ratio to output a combined current as a reference current, Wherein the regulation performed by the first trimmer for the one of the plurality of currents is monitored at a first temperature different from the second temperature based on the comparison result of the comparator, and An oscillator that generates a clock signal based on the reference current.
8. The clock signal generator of claim 7, wherein the plurality of current sources comprises: a first current source that reduces an amount of current of a first current of the plurality of currents when a temperature increases, and A second current source that increases an amount of current of a second current of the plurality of currents when the temperature increases.
9. The clock signal generator of claim 8, Wherein the mixer comprises: A second trimmer that adjusts the amount of current of the first current at the second temperature; a third trimmer that adjusts the amount of current of the second current at the second temperature, and A combiner that combines the outputs of the second trimmer and the third trimmer.
10. The clock signal generator of claim 9, wherein the bandgap reference circuit further comprises: And a fourth trimmer that adjusts the amount of current of the current output from the mixer based on a preset reference.
11. A power circuit, the power circuit comprising: A bandgap reference circuit, the bandgap reference circuit comprising: a first trimmer that adjusts a voltage level of one voltage among a plurality of voltages respectively output from a plurality of voltage sources having different temperature coefficients to be equal to a voltage level of another voltage among the plurality of voltages, A comparator comparing the regulated voltage with the other voltage among the plurality of voltages, and A mixer that adjusts voltage levels of the plurality of voltages to be equal to each other at a second temperature to determine a polymerization ratio, and combines the plurality of voltages based on the polymerization ratio to output a combined voltage as a reference voltage, Wherein the adjustment performed by the first trimmer for the one of the plurality of voltages is monitored at a first temperature different from the second temperature based on the comparison result of the comparator, and A regulator that receives an external supply voltage to generate an internal supply voltage based on the reference voltage.
12. The power circuit of claim 11, wherein the plurality of voltage sources comprises: a first voltage source reducing a voltage level of a first voltage of the plurality of voltages, and A second voltage source that increases a voltage level of a second voltage of the plurality of voltages.
13. The power circuit according to claim 12, Wherein the mixer comprises: a second trimmer that adjusts a voltage level of the first voltage at the second temperature; A third trimmer that adjusts the voltage level of the second voltage at the second temperature, and A combiner that combines the outputs of the second trimmer and the third trimmer.
14. The power circuit of claim 13, wherein the bandgap reference circuit further comprises: And a fourth trimmer that adjusts a voltage level of the voltage output from the mixer based on a preset reference.
15. The power circuit of claim 11, further comprising: and the voltage sensor monitors whether the voltage level of the internal power supply voltage is lower than a preset level.

Description

Bandgap reference circuit, clock signal generator and power circuit Technical Field Various embodiments of the present disclosure described herein relate to semiconductor devices, and more particularly, to an apparatus capable of generating a reference current or a reference voltage at various temperatures. Background The semiconductor device can be designed to operate stably even if a change occurs in PVT. Here, the change (or variation) of PVT (process, voltage, temperature) may include a process variation, which is a phenomenon in which the operation speed of the PMOS/NMOS transistor is different due to a cause in the manufacture of the semiconductor device, a temperature variation, which is another phenomenon in which the operation speed of the PMOS/NMOS transistor is varied according to the temperature inside the semiconductor device, and a voltage variation, which is another phenomenon in which the operation speed of the PMOS/NMOS transistor is varied according to the voltage or power supplied to the semiconductor device. The bandgap reference circuit may be an important component in analog and digital systems, and may be embedded and used as a reference voltage source or a reference current source. The supply voltages of analog and digital systems are becoming lower to achieve lower power consumption, which is possible due to the development of manufacturing techniques. Bandgap reference circuits included in analog and digital systems can operate at low voltages to compensate for temperature changes. Disclosure of Invention Embodiments of the present disclosure may provide a circuit or device that supports stable operation by compensating for a change in temperature inside a semiconductor device. In addition, in an embodiment, a semiconductor device that compensates for a change in temperature may provide a memory system or a data processing system capable of safely protecting and rapidly processing data stored in the memory device. Embodiments of the present disclosure may provide a bandgap reference circuit, a clock signal generator including the bandgap reference circuit, a power circuit including the bandgap reference circuit, a semiconductor device including the clock signal generator or the power circuit, a memory system including the semiconductor device, and a data processing apparatus including the memory system. In one embodiment, a bandgap reference circuit may include a plurality of current sources having different temperature coefficients, a first trimmer configured to adjust amounts of a plurality of currents individually output from each of the plurality of current sources to be equal to each other, and a mixer configured to adjust a polymerization ratio and combine the plurality of currents based on the polymerization ratio. The plurality of current sources may include a first current source configured to reduce an amount of current of a first current of the plurality of currents and a second current source configured to increase an amount of current of a second current of the plurality of currents. The first current source may include a plurality of diodes, a plurality of diode-connected transistors, or a plurality of Bipolar Junction Transistors (BJTs). According to one embodiment, the second current source may output a difference between currents flowing through two components having different sizes included in the first current source as the second current. The first trimmer may adjust the amount of the first current output from the first current source. The bandgap reference circuit may further include a comparator configured to compare the second current output from one of the plurality of current sources with the first current output through the first trimming device. An adjustment performed by the first trimmer for at least one amount of current of the plurality of currents may be monitored at a first temperature based on a comparison result of the comparator. The mixer may adjust the amounts of the plurality of currents to be equal to each other at a second temperature different from the first temperature. The mixer may include a second trimmer configured to adjust the amount of the first current at the second temperature, a third trimmer configured to adjust the amount of the second current at the second temperature, and a combiner configured to combine the outputs of the second trimmer and the third trimmer. The bandgap reference circuit may further include a fourth trimmer configured to adjust an amount of current output from the mixer based on a preset reference. The word "preset" as used herein with respect to a parameter (e.g., a preset reference, a preset period of time, a preset function or purpose, and a preset range) refers to determining a value of the parameter prior to using the parameter in a process or algorithm. For some embodiments, the values of the parameters are determined before the process or algorithm begins. In other embodiments, the values of the para