| 摘要 |
<p>20- An improved frequency synthesizer suitable for use in mobile and portable radio applications using multiple dual modulus prescalers to achieve high frequency operation and low current drain. A first high speed prescaler of limited size is used in conjunction with a second prescaler to avoid the use of one large high speed prescaler to attain high frequency operation. Consequently, the frequency synthesizer can be constructed using only a minimum amount of high speed, high current drain logic thereby reducing costs and power consumption.</p> |
