Abstract
A low-voltage programmable frequency divider with wide input frequency range is fabricated in standard 0.18µm TSMC RF CMOS technology and presented in this paper. Considering the frequency division ratio of dual-modulus prescaler is relatively smaller, a programmable divider with full custom design is used to increase the frequency division ratio and the maximum operating frequency. The frequency division ratio of the programmable frequency divider covers from 64 to 255. And the measured results show that the programmable divider works correctly when the input frequency varies from 0.5 GHz to 6.0 GHz, with 1V supply. Besides, the power consumption is 3.5 mA at the maximum frequency of 6.0 GHz.
Highlights
With the rapid development of wireless communication, various kinds of wireless communication mode are springing up constantly, making the integration of a variety of wireless communication in a mobile terminal a development tendency
Many domestic and foreign scholars have made a thorough research about multi-mode multifrequency broadband frequency synthesizers [1,2,3] which is indispensable in a multi-mode RF transceiver
The measured results states that, when the input frequency varies from 0.5 GHz to 6.0 GHz, the programmable divider can work effectively
Summary
With the rapid development of wireless communication, various kinds of wireless communication mode are springing up constantly, making the integration of a variety of wireless communication in a mobile terminal a development tendency. Many domestic and foreign scholars have made a thorough research about multi-mode multifrequency broadband frequency synthesizers [1,2,3] which is indispensable in a multi-mode RF transceiver. The programmable frequency divider as a critical module in multi-mode multifrequency frequency synthesizers, is required to work under the broadband and high frequency [4,5]. The two counters are designed by semi-custom design approach, which can only work at a low frequency band. In order to obtain a higher working frequency, the counters presented in this paper are designed by full custom design approach. The frequency division ratio of dual-modulus prescaler is designed to be small to lower the minimum frequency division ratio of the whole programmable frequency divider. The programmable frequency divider presented in this paper has a large frequency division ratio range
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