Choong-yul Cha
16Patents
4h-index
18Co-inventors
53Inventor score
Filing activity: Sep 15, 2004 → Oct 12, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7812644B2 | Digital frequency detector and digital phase locked loop using the digital frequency detector | Electricity | 30 | Active |
| US7310023B2 | Frequency synthesizer | Electricity | 22 | Active |
| US7616061B2 | Low noise amplifier for ultra wide band | Electricity | 6 | Active |
| US7123112B2 | Complementary voltage controlled oscillator | Electricity | 5 | Expired |
| US7420429B2 | Source coupled differential complementary colpitts oscillator | Electricity | 4 | Active |
| US7397317B2 | Quadrature signal generator for tuning phases of all of four generated quadrature signals | Electricity | 3 | Expired |
| US7983639B2 | RF filter and digital broadcast receiving tuner and RF signal processing device using RF filter | Electricity | 3 | Active |
| US7710835B2 | High resolution time detecting apparatus using interpolation and time detecting method using the same | Electricity | 3 | Active |
| US7345551B2 | Frequency synthesizer for mixing reference frequencies | Electricity | 3 | Expired |
| US7915968B2 | Digitally controlled oscillator (DCO) | Electricity | 2 | Active |
| US7725088B2 | Fast mode switching frequency synthesizing apparatus and method for operating in low power consumption | Electricity | 2 | Active |
| US9742444B1 | Broadband digital transmitter using π/4 phase offset local oscillator (LO) signals | Electricity | 1 | Active |
| US7580486B2 | Multi-input multi-frequency synthesizing apparatus and method for multi-band RF receiver | Electricity | 1 | Active |
| US7847636B2 | Low noise amplifier for ultra wide band | Electricity | 1 | Active |
| US8885773B2 | Radio architecture for an ultra low power receiver | Electricity | 1 | Active |
| US10270348B2 | Synchronous switching regulator circuit | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.