Circuit layout for improving power supply rejection ratio

A circuit layout for improving a power supply rejection ratio (PSRR), the circuit layout comprising:

• a radio frequency (RF) choke positioned in a first metal layer, the RF choke including a first choke electrode and a second choke electrode that is used for being coupled with a voltage supply terminal;
• and
• an inductor of a main circuit, the inductor including:
• a primary-side coil including a first primary-side coil, a second primary-side coil, a first primary-side electrode, and a second primary-side electrode, wherein:
• both the first primary-side coil and the second primary-side coil are positioned in the first metal layer and are surrounded by the RF choke;
• the first primary-side electrode is coupled with the first choke electrode;
• and the second primary-side electrode is coupled with a signal input circuit of the main circuit;
• and
• a secondary-side coil including a first secondary-side coil, a second secondary-side coil, a first secondary-side electrode, and a second secondary-side electrode, wherein:
• the first secondary-side coil is positioned in the first metal layer and is surrounded by the RF choke;
• the second secondary-side coil is positioned in a second metal layer;
• and both the first secondary-side electrode and the second secondary-side electrode are used for signal output,
• wherein the RF choke and the inductor jointly form mutual induction to suppress a noise of a supply voltage of the voltage supply terminal.

A circuit layout for improving a power supply rejection ratio (PSRR), the circuit layout comprising:

• a radio frequency (RF) choke including:
• a first choke coil positioned in a first metal layer, the first choke coil including a first choke electrode;
• and
• a second choke coil positioned in a second metal layer, the second choke coil including a second choke electrode for being coupled with a voltage supply terminal;
• and
• an inductor of a main circuit, the inductor including:
• a primary-side coil including a first primary-side coil, a second primary-side coil, a first primary-side electrode, and a second primary-side electrode, wherein:
• both the first primary-side coil and the second primary-side coil are positioned in the first metal layer;
• the first primary-side electrode is coupled with the first choke electrode;
• and the second primary-side electrode is coupled with a signal input circuit of the main circuit;
• and
• a secondary-side coil including a first secondary-side coil, a second secondary-side coil, a first secondary-side electrode, and a second secondary-side electrode, wherein both the first secondary-side electrode and the second secondary-side electrode are used for signal output,
• wherein an interval between the secondary-side coil and the RF choke is determined according to a predetermined interval requirement so that the RF choke and the inductor jointly form mutual induction and thereby suppress a noise of a supply voltage of the voltage supply terminal.