Abstract: The present invention is directed to a set of golf clubs comprising long irons, mid irons and short irons. Preferably, at least the long and mid irons have a face stabilizing bar and back panel and the face stabilizing bar includes a retainer clip and elastomeric material.

Abstract: A golf club head including a striking face, a periphery portion, and a support arm spaced from the rear surface of the striking face, a first damping element residing between the support arm and the rear surface of the striking face, wherein the first damping element comprises a front surface in contact with the rear surface of the striking face and a rear surface in contact with the support arm, wherein the periphery portion comprises a sole, and a second damping element located between the first damping element and the sole, a front portion of the second damping element in contact with the rear surface of the striking face, a rear surface of the second damping element in contact with the support arm.

Abstract: A golf club head including a striking face, a periphery portion, and a support arm spaced from the rear surface of the striking face, a first damping element residing between the support arm and the rear surface of the striking face, wherein the first damping element comprises a front surface in contact with the rear surface of the striking face and a rear surface in contact with the support arm, wherein the periphery portion comprises a sole, and a second damping element located between the first damping element and the sole, a front portion of the second damping element in contact with the rear surface of the striking face, a rear surface of the second damping element in contact with the support arm.

Abstract: A golf club head including a striking face, a periphery portion, and a support arm spaced from the rear surface of the striking face, a first damping element residing between the support arm and the rear surface of the striking face, wherein the first damping element comprises a front surface in contact with the rear surface of the striking face and a rear surface in contact with the support arm, wherein the periphery portion comprises a sole, and a second damping element located between the first damping element and the sole, a front portion of the second damping element in contact with the rear surface of the striking face, a rear surface of the second damping element in contact with the support arm.

Abstract: A golf club head including a striking face, a periphery portion, and a support arm spaced from the rear surface of the striking face, a first damping element residing between the support arm and the rear surface of the striking face, wherein the first damping element comprises a front surface in contact with the rear surface of the striking face and a rear surface in contact with the support arm, wherein the periphery portion comprises a sole, and a second damping element located between the first damping element and the sole, a front portion of the second damping element in contact with the rear surface of the striking face, a rear surface of the second damping element in contact with the support arm.

Abstract: A golf club head including a striking face, a periphery portion, and a support arm spaced from the rear surface of the striking face, a first damping element residing between the support arm and the rear surface of the striking face, wherein the first damping element comprises a front surface in contact with the rear surface of the striking face and a rear surface in contact with the support arm, wherein the periphery portion comprises a sole, and a second damping element located between the first damping element and the sole, a front portion of the second damping element in contact with the rear surface of the striking face, a rear surface of the second damping element in contact with the support arm.

Abstract: On-chip absolute value measurement circuit and an on-chip capacitor mismatch value measurement circuits are provided. The absolute value measurement circuit begins charging a capacitor. When the voltage across the capacitor reaches a first threshold, the absolute value measurement circuit starts a counter. When the voltage across the capacitor reaches a second threshold, the counter stops. The counter value is provided as digital output. A computer device reads the digital output and calculates the absolute value of the capacitor based on the counter value. The mismatch measurement circuit repeatedly charges an evaluation capacitor and transfers the charge from the evaluation capacitor to an integrating capacitor. For each transfer of charge, a counter is incremented until the voltage across the integrating capacitor reaches a threshold voltage. The counter value is provided as digital output. This process is repeated for each evaluation capacitor on the chip.

Abstract: On-chip absolute value measurement circuit and an on-chip capacitor mismatch value measurement circuits are provided. The absolute value measurement circuit begins charging a capacitor. When the voltage across the capacitor reaches a first threshold, the absolute value measurement circuit starts a counter. When the voltage across the capacitor reaches a second threshold, the counter stops. The counter value is provided as digital output. A computer device reads the digital output and calculates the absolute value of the capacitor based on the counter value. The mismatch measurement circuit repeatedly charges an evaluation capacitor and transfers the charge from the evaluation capacitor to an integrating capacitor. For each transfer of charge, a counter is incremented until the voltage across the integrating capacitor reaches a threshold voltage. The counter value is provided as digital output. This process is repeated for each evaluation capacitor on the chip.