With the maturity of Bluetooth headset technology, Bluetooth headsets have become electronic products that people carry and use at any time in their daily lives. The circuit board inside the Bluetooth headset has a chip crystal oscillator, which provides a stable working clock pulse frequency. Without this small chip crystal oscillator, the entire Bluetooth function will not work properly.
According to canalys data, the global shipments of wireless headphones in Q1 2022 will be 68.2 million units, a year-on-year increase of 17% . The development trend of "wireless" in the global audio industry is obvious. A pair of headphones requires two crystal oscillators, and the gradual increase in the Bluetooth headset market will drive the demand for crystal oscillators to grow.
Among them, the sound quality and noise reduction of Bluetooth headsets are the performance indicators that users pay most attention to when purchasing. When major Bluetooth headset manufacturers conduct product research and development, the key to affecting noise is the crystal oscillator , so it is very important to choose a crystal oscillator with good quality and stability.
How to choose a bluetooth headset crystal oscillator? Recommend 3 commonly used crystal oscillator solutions for bluetooth headsets to help customers develop products faster.
#1 True Wireless Bluetooth Headphones
True wireless earphones refer to earphones without traditional cables, including Bluetooth earphones, infrared earphones, etc., users have extremely high requirements for sound quality and noise reduction performance.
#2 Neck Hanging Bluetooth Headphones
Common neck-mounted sports Bluetooth headsets are generally small in size, so the selected Bluetooth crystal oscillator is small in size and has slightly higher quality requirements.
#3 Bluetooth Headphones
Compared with ear-type Bluetooth headsets, head-mounted Bluetooth headsets are larger in size and have better noise reduction and sound quality. In the selection of crystal oscillators, you can choose crystal oscillators with lower power consumption.
Judging from the crystal oscillators used in the above three Bluetooth headsets, the mainstream crystal oscillator packages used in Bluetooth headsets are 1612, 2016, 2520, etc .; 10PPM crystal oscillators are generally used for frequency accuracy, because ±10PPM is more stable and reliable , and commonly used Load capacitors are 7PF, 9PF, 12PF, 20PF, among which 9PF is the most widely used . Customers and friends should pay attention when selecting crystal oscillators.