Patent ID: 11901865
Assignee: STMICROELECTRONICS INTERNATIONAL N.V.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. The low power crystal oscillator circuit of claim 6, further comprising:
a third startup control transistor having a first terminal coupled to the crystal output terminal, a second terminal and a gate terminal configured to receive the inverse startup control;
a sixth current mirror transistor having a first terminal coupled to the low power supply, a gate terminal coupled to the crystal output terminal and a second terminal coupled to the second terminal of the third startup control transistor, the sixth current mirror transistor having a channel with a fourth width to length ratio that is Z times greater than the first width to length ratio;
a fourth startup control transistor having a first terminal coupled to the crystal output terminal, a second terminal and a gate terminal configured to receive the startup control; and
a seventh current mirror transistor having a first terminal coupled to the low power supply, a gate terminal coupled to the gate terminal of the fifth current mirror transistor and a second terminal coupled to the second terminal of the fourth startup control transistor, the seventh current mirror transistor having a channel with a fifth width to length ratio that is W times greater than the fifth width to length ratio.