Patent ID: 7881679

Claim:
An integrated phase locked loop and power amplifier circuit comprising: a. a phase locked loop circuit configured to transmit an output frequency, the phase locked loop circuit having a first voltage source and a first ground connection; b. a first guard ring set coupled to the first voltage source and the first ground connection, wherein the first guard ring set substantially encompasses the phase locked loop circuit, and the first guard ring set includes a first collector ring and a first ground ring; c. a mixer coupled to the phase locked loop circuit configured to receive the output frequency and an input signal, modulate the output frequency with the input signal thereby forming a modulated signal, and transmit the modulated signal; d. a power amplifier coupled to the mixer configured to receive the modulated signal, amplify the modulated signal thereby forming an output signal, and transmit the output signal, the power amplifier having a second voltage source and a second ground connection; and e. a second guard ring set coupled to the second voltage source and the second ground, wherein the second guard ring set substantially encompasses the power amplifier, and the first guard ring set includes a second collector ring and a second ground ring.