US Patent No. 9,300,274

METHOD OF PROVIDING MULTIPLE VOLTAGE REFERENCES TO A RADIO-FREQUENCY DEVICE USING A SINGLE ANALOG LINE


Patent No. 9,300,274
Issue Date March 29, 2016
Title Method Of Providing Multiple Voltage References To A Radio-frequency Device Using A Single Analog Line
Inventorship Aleksandr Semenyshev, Apex, NC (US)
Shawn Walsh, Cary, NC (US)
Ying Shen, Chapel Hill, NC (US)
Thanh Hung Nguyen, Cary, NC (US)
Hong Hu, Xian (CN)
Assignee ZTE CORPORATION, Shenzhen (CN)

Claim of US Patent No. 9,300,274

1. A method of providing multiple voltage references to a radio frequency (RF) device using a single analog line, comprising:
setting the analog line voltage level to be a first reference voltage signal;
instructing a first voltage reference device to memorize the first reference voltage signal by sending a first digital control
signal to a digital line;

providing the first reference voltage signal to the RF device via the first voltage reference device;
re-setting the analog line voltage level to be a second reference voltage signal;
instructing a second voltage reference device to memorize the second reference voltage signal by sending a second digital
control signal to the digital line, wherein the second digital control signal is different from the first digital control
signal; and

providing the second reference voltage signal to the RF device via the second voltage reference device, wherein the RF device
is configured to receive a first frequency signal and a second frequency signal, and output a third frequency signal based
on one of the first and second reference voltage signals.