US 12,076,551 B2
Pulse current generation circuit
Bin Xia, Shenzhen (CN); Yu Zhao, Shenzhen (CN); Yu Lin, Shenzhen (CN); and Zhi Chen, Shenzhen (CN)
Assigned to SHENZHEN SIBIONICS TECHNOLOGY CO., LTD., Shenzhen (CN)
Filed by SHENZHEN SIBIONICS TECHNOLOGY CO., LTD., Shenzhen (CN)
Filed on Aug. 17, 2021, as Appl. No. 17/445,215.
Application 17/445,215 is a continuation of application No. 16/337,920, granted, now 11,097,105, issued on Aug. 24, 2021, previously published as PCT/CN2017/104678, filed on Sep. 29, 2017.
Claims priority of application No. 201610875326.8 (CN), filed on Sep. 30, 2016; and application No. 201610879293.4 (CN), filed on Sep. 30, 2016.
Prior Publication US 2022/0032057 A1, Feb. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61N 1/36 (2006.01); A61N 1/05 (2006.01); H03K 3/017 (2006.01); H03K 3/78 (2006.01); H03K 5/00 (2006.01); H03K 5/02 (2006.01)
CPC A61N 1/36046 (2013.01) [A61N 1/0543 (2013.01); A61N 1/36125 (2013.01); A61N 1/36142 (2013.01); A61N 1/36175 (2013.01); H03K 3/017 (2013.01); H03K 3/78 (2013.01); H03K 5/00006 (2013.01); H03K 5/02 (2013.01); A61N 1/36157 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A pulse current generation circuit, comprising:
an analogue signal receiving device for receiving an analogue signal;
an analogue-to-digital converter for converting the analogue signal into a digital control signal;
a current signal controller for producing, according to the digital control signal, pulse current parameters for generating bidirectional pulse current signals; and
a current generator for generating, according to the pulse current parameters, bidirectional pulse current signals;
wherein:
the current generator generates pulse currents of different precisions according to the pulse current parameters;
the current generator generates a low-precision pulse current or a high-precision pulse current according to the pulse current parameters;
the current generator is configured to:
judge whether the bidirectional pulse current signals to be generated are less than a critical value after receiving the pulse current parameters;
generate the high-precision pulse current when the bidirectional pulse current signals to be generated are less than or equal to the critical value; and
generate the low-precision pulse current when the bidirectional pulse current signals to be generated are greater than the critical value;
the bidirectional pulse current signals are for neural stimulation;
a total charge amount of the bidirectional pulse current signals is within a safe charge amount during one stimulation period;
the pulse current generation circuit further comprises a charge compensation circuit configured to determine whether to conduct charge compensation on a current generator according to a total charge amount during one stimulation period of the bidirectional pulse current signals, so as to ensure that the total charge amount generated by the current generator is within a safe charge amount range;
an amplitude of a compensation pulse current signal is lower than a preset amplitude; and
a period of the compensation pulse current signal is less than a period of the bidirectional pulse current signals.