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Case Study 1 - PIR Detector
Bill of Materials reduction
Customer had an existing design incorporating -
- 1,500 logic gates
- 2 Op Amps
- 4 Comparators
- 1 RC Oscillator
- 1 voltage reference.
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| Original PIR Detector circuit |
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The unit -
- needed to consume less than 50 µamps from a 5 volt supply.
- Volumes were 45,000 per year
- the product had a 5-7 year life.
After
After a £3,000 definition phase, Silicon Microsystems suggested
- a mixed signal ASIC using a 3µm CMOS cell library technology
- Costs were £36,000 for the non-recurring engineering
- the unit price resulted in a £2.00 cost saving per unit.
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| After ASIC replacement |
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The NRE was recovered within the first year of production.
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