1. A wireless communication apparatus comprising:
a first amplifier configured to amplify an input signal;
a second amplifier configured to amplify the input signal when an input level of the input signal is equal to or larger than a given level;
an impedance converter configure to switch an load impedance of the first amplifier and output a composite output of an output from the first amplifier and an output from the second amplifier;
an impedance controller section configured to control a switching of the load impedance of the first amplifier based on a bandwidth of the input signal;
a distortion compensation section configured to perform distortion compensation of the input signal and supply a compensated input signal to the first amplifier and the second amplifier; and
a filter section configured to limit a band of a signal output from the impedance converter.
2. The wireless communication apparatus according to claim 1, wherein the impedance converter includes:
a transmission channel configured to transmit the composite output; and
a capacitor coupled to the transmission channel via a switch.
3. The wireless communication apparatus according to claim 2, wherein the load impedance of the first amplifier is switched based on on and off of the switch.
4. The wireless communication apparatus according to claim 1, wherein the impedance converter includes:
a transmission channel configured to transmit the composite output;
a first capacitor coupled to the transmission channel via a first switch; and
a second capacitor coupled to the transmission channel via a second switch.
5. The wireless communication apparatus according to claim 1, wherein the impedance controller section controls the switching so that the load impedance of the first amplifier becomes equal to an impedance at an output of the impedance converter when the bandwidth is equal to or less than a given value.
6. The wireless communication apparatus according to claim 1, wherein the impedance controller section controls the switching so that the load impedance of the first amplifier becomes equal to an impedance at an output of the impedance converter when the bandwidth is equal to or less than a given value and setting of transmission power of the input signal is equal to or larger than a given power.
7. The wireless communication apparatus according to claim 1, wherein the impedance controller section controls the switching so that the load impedance of the first amplifier becomes larger than an impedance at an output of the impedance converter when the bandwidth is equal to or less than a given value and setting of transmission power of the input signal is less than a given power.
8. The wireless communication apparatus according to claim 7, wherein the impedance controller section controls the switching so that the load impedance of the first amplifier becomes twice the impedance at the output of the impedance converter.
9. A Doherty amplifier comprising:
a first amplifier configured to amplify an input signal;
a second amplifier configured to amplify the input signal when an input level of the input signal is equal to or larger than a given level;
an impedance converter configure to switch an load impedance of the first amplifier and output a composite output of an output from the first amplifier and an output from the second amplifier; and
an impedance controller section configured to switch the load impedance of the first amplifier based on a bandwidth of the input signal.
10. A method for controlling wireless communication comprising:
performing distortion compensation of an input signal and supplying the compensated input signal to a first amplifier and a second amplifier;
amplifying the input signal with the first amplifier;
amplifying the input signal with the second amplifier when an input level of the input signal is equal to or larger than a given level;
switching an load impedance of the first amplifier and outputting a composite output of an output from the first amplifier and an output from the second amplifier based on a bandwidth of the input signal; and
limiting a band of a signal output from an impedance converter.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A maneuverable exercise apparatus comprising:
a frame structure means comprising a base structure with a user support member mounted thereon;
an upper body engagement means comprising a right handle assembly and a left handle assembly, said right handle assembly pivotally coupled to the right side of said base structure of said frame structure means, said left handle assembly pivotally coupled to the left side of said base structure of said frame structure means, each of said handle assemblies having a hand engagement member which pivots in the generally forward and backward directions;
a lower body engagement means comprising a generally upward extending support structure pivotally mounted to said frame structure means, said support structure having leg engagement members mounted to its top end, and right and left handle assembly engagement members mounted to its bottom end;
whereby said right handle member may engage said right handle assembly engagement member and said left handle member may engage said left handle assembly engagement member, such that moving said right handle member and said left handle member in the backward direction may produce pivoting motion of said support structure of said lower body engagement means in the backward direction, and pivoting of said support structure of said lower body engagement means in the forward direction may produce pivoting motion of said right and left handle members in the forward direction; whereby a user may position themselves in a generally lying position on said user support member of said frame strcuture means, engage said upper body engagement means with their hands, engage said lower body engagement means with their legs, and use the upper body engagement means to produce pivoting motion in said support structure of said lower body engagement means and alternately use said lower body engagement means to produce pivoting motion in said handle members of said upper body engagement means.
2. The maneuverable exercise apparatus as claimed in claim 1 further comprising an engagement support member pivotally coupled to the forward end of said base structure of said frame strcuture means such that the pivoting motion of said engagement support member is in the generally upward and downward directions; said support structure of said lower body engagement means coupled to said engagement support member so that it pivots in conjunction with said engagement support member, said support structure being pivotally coupled to said engagement support member in such a manner that said support structure may also pivot in the side directions.
3. The maneuverable exercise apparatus as claimed in claim 1, said right and left handle assemblies further comprising a support structure and a curved member, said support structure being a generally L-shaped member pivotally coupled to said base structure of said frame structure means, said hand engagement member mounted to one end of said support structure, said curved member mounted to the opposite end of said strcuture, whereby pulling said hand engagement member in the backward direction produces upward movement of said respective curved member.
4. The maneuverable exercise apparatus as claimed in claim 1, said handle assembly engagement members of said lower body engagement being outwardly extending curved members, said curved members of said lower body engagement means operatively engaging said curved members of said upper body engagement means.
5. The maneuverable exercise apparatus as claimed in claim 1 further comprising a resistance commponent which is used to provide a resistance to the movements of said upper and lower body engagement means.
6. The maneuverable exercise apparatus as claimed in claim 3, said curved members of said lower body engagement means being rotatably mounted to said support structure of said lower body engagement means.
7. The maneuverable exercise apparatus as claimed in claim 1, said right and left handle assemblies further comprising a support structure and a curved member, said support structure being a generally L-shaped member slideably coupled to said base structure of said frame structure means, said hand engagement member rigidly mounted to one end of said support structure, said curved member rotatably mounted to the opposite end of said structure member, whereby pulling said hand engagement member in the backward direction produces backward movement of said respective curved member, said curved member having a varying contour.
8. The maneuverable exercise apparatus as claimed in claim 6, said curved members of said lower body engagement means being rotatably mounted to said support structure of said lower body engagement means.
9. The flexible exercise apparatus as claimed in claim 1, said right and left handle assemblies further comprising a support structure and a curved member, said support structure being slideably coupled to said base structure of said frame structure means, said hand engagement member pivotally mounted to one end of said support structure through a connection means, said curved member rotatably mounted to the opposite end of said structure member, whereby pulling said hand engagement member in the backward direction produces backward movement of said respective curved member, said curved member having a varying contour.
10. The maneuverable exercise apparatus as claimed in claim 8, said curved members of said lower body engagement means being rotatably mounted to said support structure of said lower body engagement means.