US 12,479,006 B2
Electronic device and method for operating resonator element at resonance frequency
Eu Ho Chong, Anyang-si (KR); Jae Wook Lee, Seoul (KR); and Ki Tae Park, Seoul (KR)
Assigned to IRON DEVICE CORPORATION, Seoul (KR)
Filed by IRON DEVICE CORPORATION, Seoul (KR)
Filed on Jul. 27, 2023, as Appl. No. 18/359,896.
Claims priority of application No. 10-2023-0093299 (KR), filed on Jul. 18, 2023.
Prior Publication US 2025/0025915 A1, Jan. 23, 2025
Int. Cl. B06B 1/02 (2006.01); B06B 1/04 (2006.01); G06F 3/01 (2006.01); H02N 2/14 (2006.01); H02P 25/032 (2016.01)
CPC B06B 1/0215 (2013.01) [B06B 1/045 (2013.01); G06F 3/016 (2013.01); H02N 2/14 (2013.01); H02P 25/032 (2016.02)] 8 Claims
OG exemplary drawing
 
1. An electronic device for operating a resonator element at a resonance frequency, the electronic device comprising:
a control unit configured to control driving of the resonator element connected to an output terminal of an amplifier unit in a manner in which a drive signal is acquired according to a first clock signal and input to the amplifier unit;
a phase difference detection unit configured to detect a phase difference between a voltage and a current at the output terminal of the amplifier unit; and
a frequency variation unit configured to vary a frequency of the first clock signal based on the phase difference detected by the phase difference detection unit, to converge an operating frequency of the resonator element to the resonance frequency,
wherein the frequency variation unit comprises a mux, an accumulator, a counter, and a flip-flop, and
wherein a state transition of the first clock signal occurs as the accumulator and counter operate according to a second clock signal, the mux outputs a first value or a second value according to a value of the phase difference, the accumulator accumulates the output value of the mux to a default value preset as an initial value and outputs the accumulated value, the counter outputs a count value according to the second clock signal, and the flip-flop operates to toggle when the output value of the accumulator and the output value of the counter are equal.