17840093. PASSIVE ACTIVE HYBRID LC FILTER simplified abstract (APPLE INC.)
Contents
PASSIVE ACTIVE HYBRID LC FILTER
Organization Name
Inventor(s)
Pengbei Zhang of San Diego CA (US)
Aly Mohamed Mamdouh Ismail of San Diego CA (US)
PASSIVE ACTIVE HYBRID LC FILTER - A simplified explanation of the abstract
This abstract first appeared for US patent application 17840093 titled 'PASSIVE ACTIVE HYBRID LC FILTER
Simplified Explanation
The patent application is about a filtering technique in an electronic device's transceiver. It addresses the issue of excessive power consumption in active analog filters as signal bandwidth increases. The solution proposed is to use a passive ladder LC filter instead. However, some LC ladder filters have limited quality factor (Q) which can cause undesirable effects like voltage droop. To overcome this, certain components in the LC ladder filter are relocated to the feedback chain of an amplifier connected to the LC ladder filter. This new structure allows tuning of the components without causing additional voltage droop.
- Active analog filters in transceivers can consume excessive power as signal bandwidth increases.
- A passive ladder LC filter is proposed as an alternative to reduce power consumption.
- Some LC ladder filters have limited quality factor (Q) leading to undesirable effects like voltage droop.
- Components in the LC ladder filter can be relocated to the feedback chain of an amplifier to address voltage droop.
- This new structure allows tuning of the LC ladder filter without causing additional voltage droop.
Potential Applications
- Electronic devices with transceivers requiring filtering techniques.
- Communication systems where linearity and noise reduction are important.
Problems Solved
- Excessive power consumption in active analog filters.
- Limited quality factor (Q) causing voltage droop in LC ladder filters.
Benefits
- Reduced power consumption in transceivers.
- Improved linearity and noise reduction in transceivers.
- Tuning of LC ladder filters without voltage droop.
Original Abstract Submitted
This disclosure is directed to filtering in a transceiver of an electronic device. In some instances, active analog filters may be deployed in the transceiver of the electronic device to achieve greater linearity and/or reduce noise in the transceiver. However, as signal bandwidth grows increasingly larger, an active analog filter may consume excessive power. To remedy the excessive power consumption, a passive ladder LC filter may be used. Some LC ladder filters may include a limited quality factor (Q), which may lead to undesirable effects in the transceiver (e.g., voltage droop). To address these undesirable effects, certain components in the LC ladder filter may be relocated from an input port to a feedback chain of an amplifier coupled to the LC ladder filter. The new structure may enable components in the LC ladder filter to be tuned without causing additional voltage droop across the LC ladder filter.
