Shenzhen Sts Microelectronics Co., Ltd.

Stmicroelectronics (shenzhen) R&d Co. Ltd.

Gang Zha

Solomon K Ng

Ni Zeng

Yiwei Zhang

Xianfeng Xiong

Da Song Lin

Dasong Lin

Solomon Ng

An embodiment of the invention relates to a power converter formed with an error amplifier and a related method. In an embodiment, a first switch is coupled in series with an error amplifier compensation capacitor. Upon detection of a current level greater than a threshold level, the compensation capacitor is decoupled from the error amplifier by opening the first switch. In an embodiment, a second switch is coupled in parallel with the compensation capacitor, and the current-sensing circuit enables conductivity of the second switch to discharge the compensation capacitor upon detection of the current level greater than the threshold level. The second switch is opened upon detection of the current level less than the threshold level. In an embodiment, the current-sensing circuit controls an output current of the power converter at a current-limit level upon detection of the internal current level greater than the threshold level.

Regulator over-voltage protection circuit with reduced standby current

A voltage controlled variable resistor circuit is configured to variably attenuate a variable source signal. A fixed attenuation circuit is coupled to receive the variable source signal and output an attenuated variable source signal. The variable source signal is further applied across a variable resistive divider formed of a fixed resistive circuit and a variable resistive circuit. The variable resistive circuit has a first input configured to receive the attenuated variable source signal and a second input configured to receive a variable resistance control signal. The variable resistive circuit is configured to have a resistance which is variable in response to the attenuated variable source signal and the variable resistance control signal.

Voltage controlled variable resistor suitable for large scale signal application

A compensated regulator includes a transconductance stage having a positive input for receiving a reference voltage, a negative input, and an output, an adjustable compensation block coupled between the output of the transconductance stage and ground, a feedback circuit having a first node coupled to the output of the compensated regulator, a second node coupled to the negative input of the transconductance stage, and a third node coupled to ground, and a driver stage having an input coupled to the output of the transconductance stage, a current output coupled to the output of the compensated regulator, and a sense output coupled to the adjustable compensation block.

Low drop-out linear regulator including a stable compensation method and circuit for particular use in automotive applications

A circuit structure for performing current amplification. The circuit structure may be standardized as a current amplifier cell such that many types of applications requiring current amplification may be created. The basic amplifier cell, which may accept voltage or current sources as an input signal, produces two identical output signals which may be used for feedback or serve as input to additional amplifier stages. This simple structure may be extended to perform current amplification with variable gain or AC or DC voltage-to-current conversion through the use of appropriately selected resistive elements.

Current amplifier structure

A bandgap reference circuit has a pre-regulator that achieves a low temperature coefficient through the use of a first component that generates a first voltage having a negative temperature coefficient and a second component coupled in series to the first component and which generates a second voltage having a positive temperature coefficient. This low temperature coefficient in the pre-regulator allows the bandgap reference circuit to output the bandgap voltage V with a low temperature coefficient.

Bandgap reference circuit with a pre-regulator

A temperature stable, integrated circuit full wave level detector incorporating a single stage operational amplifier design which does not require, as in prior art implementations, two operational amplifiers to perform a full wave rectification function on an input alternating current (&ldquo;AC&rdquo;) signal followed by a comparator to detect the resultant signal level. The full wave level detector of the present invention utilizes but a single amplifier and some additional peripheral components resulting in a saving in on-chip die area in an integrated circuit (&ldquo;IC&rdquo;) implementation while also exhibiting excellent temperature stability characteristics.

Temperature stable integrated circuit full wave level detector incorporating a single operational amplifier stage design

A bandgap reference circuit has a pre-regulator that achieves a low temperature coefficient through the use of a V multiplier and feedback from the output bandgap voltage V . This low temperature coefficient in the pre-regulator allows the bandgap reference circuit to output the bandgap voltage V with a low temperature coefficient.

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Shenzhen, China

Gang Zha