Claims
- 1. A voltage regulator circuit disposed between a voltage source and a voltage drain, the regulator circuit comprising:
a first transistor circuit disposed between the voltage source and the voltage drain; a control circuit coupled to control a gate of the first transistor circuit; a bias control circuit coupled to the gate of the first transistor circuit, the control circuit adapted to bias the first transistor circuit gate during power-up when the control circuit is electrically decoupled from controlling the first transistor circuit gate; and a second transistor circuit disposed between the voltage source and the voltage drain adapted to be regulated by the control circuit, the control circuit adapted to continuously control the gate of the second transistor circuit and to maintain a control loop for the voltage regulator circuit during power-up.
- 2. The regulator circuit of claim 1, wherein the second transistor circuit is coupled in parallel to the first transistor circuit.
- 3. The regulator circuit of claim 1, wherein the first transistor circuit includes a thin gate oxide transistor.
- 4. The regulator circuit of claim 1, wherein the control circuit is coupled in parallel with the first transistor circuit, the control circuit including a voltage divider ladder member.
- 5. The regulator circuit of claim 4, wherein voltage divider ladder member includes two resistive members disposed in series.
- 6. The regulator circuit of claim 5, wherein the resistive members include a third and fourth transistor adapted to decouple the ladder member when the voltage reference circuit is coupled to the first transistor after power-up, wherein the third and fourth transistors include thick gate oxide transistors.
- 7. The regulator circuit of claim 6, wherein the second transistor circuit is coupled in parallel to the first transistor.
- 8. The regulator circuit of claim 7, wherein the second transistor includes a thick gate oxide transistor.
- 9. The regulator circuit of claim 2, wherein the second transistor includes a thick gate oxide transistor.
- 10. A voltage regulator circuit between a voltage source and a voltage drain, the voltage regulator circuit comprising:
a first transistor circuit disposed between the voltage source and the voltage drain; a second transistor circuit coupled in parallel with the first transistor circuit and with the voltage reference means; control means for reversibly regulating the first and second transistor circuits; and voltage reference means coupled to the first transistor circuit.
- 11. The regulator circuit of claim 10, wherein the first transistor circuit includes a thin gate oxide transistor.
- 12. The voltage regulator circuit of claim 10 wherein the second transistor circuit includes a thick gate oxide transistor.
RELATED PATENT DOCUMENTS
[0001] This is a continuation application of Ser. No. 09/583,325, filed on May 31, 2000, (VLSI.286PA) to which Applicant claims priority under 35 U.S.C.§120.
Continuations (1)
|
Number |
Date |
Country |
Parent |
09583325 |
May 2000 |
US |
Child |
09783478 |
Feb 2001 |
US |