Apparatus for generating multiple radio frequencies in communication circuitry and associated methods
First Claim
Patent Images
1. A radio-frequency (RF) apparatus capable of transmitting radio-frequency signals, the radio-frequency apparatus comprising:
- transmitter path circuitry, including;
a voltage-controlled oscillator circuitry configured to generate a first signal that has a first frequency;
a divider circuitry being responsive to the first signal, the divider circuitry configured to generate a second signal that has a second frequency,wherein the second frequency equals the first frequency divided by a number;
a first switch coupled to the voltage-controlled oscillator circuitry, the first switch configured to generate a switched first signal by selectively supplying the first signal to a first output;
a second switch coupled to the divider circuitry, the second switch configured to generate a switched second signal by selectively supplying the second signal to a second output; and
a feedback circuitry coupled to the voltage-controlled oscillator circuitry, the feedback circuitry configured to adjust the first frequency in response to a feedback signal derived from the switched first and second signals, and wherein the feedback circuitry comprises a third switch coupled to the first and second switches, the third switch configured to selectively supply as the feedback signal one of the switched first and second signals.
1 Assignment
0 Petitions
Accused Products
Abstract
A radio-frequency (RF) apparatus capable of transmitting RF signals includes transmitter path circuitry. The transmitter path circuitry includes a voltage-controlled oscillator (VCO) circuitry. The VCO circuitry generates a first signal that has a first frequency. A divider circuitry couples to the VCO circuitry and, in response to the first signal, the divider circuitry generates a second signal that has a second frequency. The frequency of the second signal equals the frequency of the first signal divided by a number.
181 Citations
14 Claims
-
1. A radio-frequency (RF) apparatus capable of transmitting radio-frequency signals, the radio-frequency apparatus comprising:
-
transmitter path circuitry, including; a voltage-controlled oscillator circuitry configured to generate a first signal that has a first frequency; a divider circuitry being responsive to the first signal, the divider circuitry configured to generate a second signal that has a second frequency, wherein the second frequency equals the first frequency divided by a number; a first switch coupled to the voltage-controlled oscillator circuitry, the first switch configured to generate a switched first signal by selectively supplying the first signal to a first output; a second switch coupled to the divider circuitry, the second switch configured to generate a switched second signal by selectively supplying the second signal to a second output; and a feedback circuitry coupled to the voltage-controlled oscillator circuitry, the feedback circuitry configured to adjust the first frequency in response to a feedback signal derived from the switched first and second signals, and wherein the feedback circuitry comprises a third switch coupled to the first and second switches, the third switch configured to selectively supply as the feedback signal one of the switched first and second signals. - View Dependent Claims (2, 3, 4)
-
-
5. An integrated circuit, comprising:
-
a controlled oscillator configured to generate an oscillator output signal with an adjustable frequency; a feedback circuit coupled to the controlled oscillator, the feedback circuit configured to receive the oscillator output signal, the feedback circuit further configured to adjust the frequency of the oscillator output signal; a frequency converter coupled to the controlled oscillator, the frequency converter configured to generate a converter output signal at a frequency that is derived from the frequency of the oscillator output signal; a first switch coupled to the controlled oscillator, the first switch configured to selectively provide the oscillator output signal as a first output signal; a second switch coupled to the frequency converter, the second switch configured to selectively provide the converter output signal as a second output signal, wherein the frequency of the converter output signal equals a fraction of the frequency of the oscillator output signal; and a feedback circuit comprising a third switch coupled to the first and second switches, the third switch configured to selectively supply as a feedback signal one of the first and second output signals. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification