| 发明名称 |
POWER ON RESET (POR) CIRCUIT |
| 摘要 |
A Schmitt trigger circuit having an input coupled to a current summing junction. A trickle current source generates a trickle current applied to the current summing junction. A bandgap current source generates a bandgap current applied to the current summing junction (wherein the bandgap current is fixed when a supply voltage exceeds a threshold). A variable current source generates a variable current applied to the current summing junction (wherein the variable current varies dependent on the supply voltage). At the current summing junction, the variable current is offset against the trickle and bandgap currents with respect to generating a voltage that is sensed at the Schmitt trigger circuit input. |
| 申请公布号 |
US2017102727(A1) |
申请公布日期 |
2017.04.13 |
| 申请号 |
US201514887739 |
申请日期 |
2015.10.20 |
| 申请人 |
STMicroelectronics (Shenzhen) R&D Co. Ltd |
发明人 |
Liu Yong Feng |
| 分类号 |
G05F3/26 |
主分类号 |
G05F3/26 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A circuit, comprising:
a Schmitt trigger circuit having an input at a current summing junction; a trickle current source configured to generate a trickle current applied to the current summing junction; a bandgap current source configured to generate a bandgap current applied to the current summing junction, wherein the bandgap current is fixed when a supply voltage exceeds a threshold; and a variable current source configured to generate a variable current applied to the current summing junction, wherein the variable current varies dependent on the supply voltage and wherein the variable current is offset against the trickle and bandgap currents. |
| 地址 |
Shenzhen CN |
