US 10,376,205 B1
Electronic tuning fork device
Richard Jean Marie Binier, Taipei (TW)
Assigned to INNOVATIVE PRECISION INSTRUMENTS LIMITED, Hong Kong (HK)
Filed by INNOVATIVE PRECISION INSTRUMENTS LIMITED, Hong Kong (HK)
Filed on Nov. 14, 2018, as Appl. No. 16/190,489.
Int. Cl. H03B 5/30 (2006.01); A61B 5/00 (2006.01); H03G 3/30 (2006.01); G06F 3/16 (2006.01); H04R 1/02 (2006.01)
CPC A61B 5/4827 (2013.01) [A61B 5/0051 (2013.01); A61B 5/4029 (2013.01); G06F 3/165 (2013.01); H03G 3/30 (2013.01); H04R 1/028 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An electronic tuning fork device, comprising:
a control unit including a processor, electrically connected to an input unit and a display component, wherein the processor is configured to generate a first square wave signal and determine a gain parameter according to a predetermined mode, wherein the gain parameter is a value selected from between a predetermined maximum value and a predetermined minimum value;
a frequency divider electrically connected to the processor, configured to down-convert the first square wave signal and output a second square wave signal;
a first waveform conversion circuit, electrically connected to the processor, configured to convert the first square wave signal into a first sine wave signal;
a second waveform conversion circuit, electrically connected to the frequency divider, configured to convert the second square wave signal into a second sine wave signal;
a mixer, electrically connected to the first and second waveform conversion circuits, configured to mix the first sine wave signal and the second sine wave signal and output a sine wave signal, and
a gain control circuit, electrically connected to the processor and the mixer, configured to change an amplitude of the sine wave signal according to the gain parameter, wherein
when a control signal is generated, the processor receives the control signal and determines a corresponding gain parameter, the processor calculates a measurement result according to the corresponding gain parameter, the predetermined maximum value and the predetermined minimum value.