Voltage source circuit for crystal oscillation circuit

A voltage source circuit adapted to provide a work voltage to a crystal oscillation circuit, wherein the voltage source circuit and the crystal oscillation circuit are formed with a same process, the voltage source circuit comprising:

• a current source coupled between a voltage source and an output terminal;
• a first voltage drop unit having a first end coupled to the output terminal, wherein the output terminal outputs a reference voltage;
• a first P-type transistor having a source coupled to another end of the first voltage drop unit, and a gate and a drain coupled to each other;
• a first N-type transistor having a gate and a drain coupled to the drain of the first P-type transistor;
• a second voltage drop unit coupled to the source of the first N-type transistor and the ground;
• and
• a regulator unit coupled between the output terminal and the crystal oscillation circuit, configured to generate the work voltage to the crystal oscillation circuit as a voltage source of the crystal oscillation circuit in accordance with the reference voltage.

A voltage source circuit adapted to provide a work voltage to a crystal oscillation circuit, wherein the voltage source circuit and the crystal oscillation circuit are formed with a same process, the voltage source circuit comprising:

• a current source coupled between a voltage source and an output terminal;
• a first N-type transistor having a drain coupled to the output terminal, and a gate and the drain coupled to each other, wherein the output terminal outputs a reference voltage;
• a first P-type transistor having a gate and a drain coupled to each other, a source coupled to the source of the first N-type transistor, and a drain coupled to a ground;
• and
• a regulator unit coupled between the output terminal and the crystal oscillation circuit, configured to generate the work voltage to the crystal oscillation circuit as a voltage source of the crystal oscillation circuit in accordance with the reference voltage.

A voltage source circuit adapted to provide a work voltage to a crystal oscillation circuit, wherein the voltage source circuit and the crystal oscillation circuit are formed with a same process, the voltage source circuit comprising:

• a current source coupled between a voltage source and an output terminal;
• a first voltage drop unit having a first end coupled to the output terminal, wherein the output terminal outputs a reference voltage;
• a first N-type transistor having a drain coupled to another end of the first voltage drop unit, and a gate and the drain coupled to each other;
• a first P-type transistor having a gate and a drain coupled to each other, and a source coupled to the source of the first N-type transistor;
• a second voltage drop unit coupled between the drain of the first P-type transistor and the ground;
• a regulator unit coupled between the output terminal and the crystal oscillation circuit, configured to generate the work voltage to the crystal oscillation circuit as a voltage source of the crystal oscillation circuit in accordance with the reference voltage.