87
C 60 uses A/D converter oversampling and digital filtering to recording rate
Digital filters eliminate ‘out-of-band’
noise
Cut-off frequency automatically adjusted to recording rate
C 60 Analog and Frequency Inputs
Internal | BEG/EMS1 CsM
| 6/4/2010 | ©
Bosch Engineering GmbH 2009. All rights reserved, also regarding any disposal, exploitation,
reproduction, editing, distribution, as well as in the event of applications for industrial property rights.
Motorsport
Analog Inputs –
Digital Filter Details
Online
Display
Signal
Conditioning
Input
Pin
A/D
Converter
Digital
Pre-Filter
Downsampling
Digital Filter
Sensor
Evaluation
Storage
Device
Analog
Digital
8kHz
1kHz
Recording
Rate
Frequency
Spectrum
Filter Characteristic
Sensor Signal Spectrum
Noise
Frequency
Spectrum
0.5 x recording rate
0.4 x recording rate
Example:
•
100Hz recording rate (10ms)
•
<40Hz passband
(>99%)
•
>50Hz stopband
(<1%)