Add dimensionless unit 'lsb'

jadoro · web-flow · commit bccfed25aa7b · 2020-07-08T13:20:06.000+02:00
The dimensionless qualifier 'lsb' (least significant bit) is commonly used 
when describing the behavior of electronic instruments, especially in the 
context of A/D and D/A converters. It denotes a given change of the
digital value in units of the smallest possible change – one LSB.
diff --git a/quantities/units/dimensionless.py b/quantities/units/dimensionless.py
@@ -17,4 +17,11 @@
     aliases=['cts', 'counts']
 )
 
+lsb = UnitQuantity(
+    'least_significant_bit',
+    1*dimensionless,
+    symbol='lsb',
+    aliases=['lsbs']
+)
+
 del UnitQuantity
