US 11,942,315 B2
Amplifier amplitude digital control for a mass spectrometer
Johnathan W. Smith, Round Rock, TX (US); Scott T. Quarmby, Round Rock, TX (US); Dustin J. Kreft, Round Rock, TX (US); and Michael W. Senko, Sunnyvale, CA (US)
Assigned to Thermo Finnigan LLC, San Jose, CA (US)
Filed by Thermo Finnigan LLC, San Jose, CA (US)
Filed on Mar. 3, 2022, as Appl. No. 17/685,516.
Application 17/685,516 is a continuation of application No. 16/833,712, filed on Mar. 30, 2020, granted, now 11,270,874.
Prior Publication US 2023/0005728 A1, Jan. 5, 2023
Int. Cl. H01J 49/00 (2006.01); H01J 49/02 (2006.01); H01J 49/42 (2006.01)
CPC H01J 49/022 (2013.01) [H01J 49/0031 (2013.01); H01J 49/4225 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
an amplifier circuit configured to cause a radio frequency (RF) signal to drive an electrode of a component of a mass spectrometer based on an amplifier RF input signal; and
a controller circuit configured to provide the amplifier RF input signal in response to a determination that an actual amplitude of the RF signal is different than an expected amplitude, the controller circuit determining one or both of current environmental characteristics or current performance characteristics of the mass spectrometer, and the amplifier RF input signal provided based on one or both of: (i) a comparison of the current environmental characteristics and past environmental characteristics stored in a memory, or (ii) a comparison of the current performance characteristics and past performance characteristics of the mass spectrometer stored in the memory.