1
Tien Tzu Chen, Guang Nan Tzeng: Switching voltage regulator operating without a discontinuous mode. Aimtron Technology, Winston Hsu, February 20, 2007: US07180274 (55 worldwide citation)

A switching circuit operates with a first operating state and a second operating state. During the first operating state, the switching circuit allows a switching current to linearly increase. During the second operating state, the switching circuit allows the switching current to linearly decrease. ...


2
Tien Tzu Chen, Yu Ming Tsai: Light loading control circuit for a buck-boost voltage converter. Aimtron Technology, Winston Hsu, January 2, 2007: US07157888 (37 worldwide citation)

A light loading control circuit operates a switching circuit of a buck-boost voltage converter alternately in a plurality of phase cycles and a sleep period. Each phase cycle has a rising phase, a falling phase, and a maintaining phase. In the rising phase, the switching circuit is operated to incre ...


3
Tien Tzu Chen, Guang Nan Tzeng: High efficiency charge pump with prevention from reverse current. Aimtron Technology, Winston Hsu, February 7, 2006: US06995603 (35 worldwide citation)

First and second clocks are applied to first and second capacitors, respectively. First and second former-stage clocks are applied to first and second former-stage capacitors, respectively. A first switch couples the second former-stage capacitor with the first capacitor. A second switch couples the ...


4
Guang Nan Tzeng, Tien Tzu Chen: Current sensing circuit and method of a high-speed driving stage. Aimtron Technology, Seyfarth Shaw, September 14, 2004: US06791368 (33 worldwide citation)

The present invention discloses a current sensing circuit and method of a high-speed driving stage, which comprises an input stage, a level converting unit, a feedback unit, a current mirror unit and a current shunting unit. The current sensing circuit is capable of linearly detecting the output cur ...


5
Guang Nan Tzeng, Tien Tzu Chen, Chi Yang Chen: Switching DC-to-DC converter with multiple output voltages. Aimtron Technology, Winston Hsu, June 7, 2005: US06903537 (32 worldwide citation)

A switching DC-to-DC converter includes multiple power supply channels, coupled in parallel between a DC voltage source and ground, for converting the DC voltage source into multiple DC output voltages that are separate from each other. An oscillator outputs multiple oscillating signals to render ea ...


6
Tien Tzu Chen, Guang Nan Tzeng, Yu Ming Tsai: Buck-boost voltage converter. Aimtron Technology, Winston Hsu, February 13, 2007: US07176667 (29 worldwide citation)

An input switching unit selectively couples a first terminal of an inductor with an input voltage and a ground potential. An output switching unit selectively couples a second terminal of the inductor with an output voltage and the ground potential. A first pulse generating circuit generates a first ...


7
Tien Tzu Chen, Chia Hung Tsen: Charge pump drive circuit for a light emitting diode. Aimtron Technology, Winston Hsu, September 18, 2007: US07271642 (28 worldwide citation)

Through operated alternately between a charging phase and a discharging phase, a charge pump converts an input voltage source into a drive voltage for being supplied to a light emitting diode. A current setting unit determines a reference current. A current regulating unit has a current regulating t ...


8
Tien Tzu Chen: Memory card with a static electricity conducting board. Jackson Walker, June 7, 2005: US06903935 (21 worldwide citation)

A memory card with a static electricity conducting board has a circuit board, a partitioning board and a conducting board. The circuit board has two contacts. The partitioning board is mounted on the board and has two slots. The conducting board is mounted on the partitioning board and has two condu ...


9
Tien Tzu Chen, Fang Te Su: Linear voltage regulator with selectable light and heavy load paths. Aimtron Technology, Winston Hsu, September 12, 2006: US07106032 (17 worldwide citation)

A light-load power transistor and a heavy-load power transistor are connected in parallel between an input voltage and an output voltage. The light-load power transistor has a smaller current driving capability, i.e. a smaller dimension of a current path. During a light-load mode, only is the light- ...


10
Tien Tzu Chen: Reverse current preventing circuit and method. Global Mixed mode Technology, Winston Hsu, March 3, 2009: US07498791 (11 worldwide citation)

A synchronous switching voltage converter has a first switch, a second switch, and an inductor, which are all coupled together to a switch node. A reverse current preventing circuit has a current detecting circuit, a voltage detecting circuit, a delay time adjusting circuit, and a blocking circuit. ...