Medical instrument
View Patent ↗A medical instrument includes a multilayer wiring board having first, second and third wirings, a fourth wiring formed in a first wiring layer, and a fifth wiring formed in a second wiring layer. A first via conductor electrically connects the third and fifth wirings. A second via conductor electrically connects the fourth and fifth wirings. The medical instrument further includes first and second transistors, a second transistor, and a capacitor mounted on the first wiring layer side of the multilayer wiring board. The drain and source electrodes of the first transistor are electrically connected to the first and second wirings, respectively. The drain electrode of the second transistor is electrically connected to the second wiring. The source electrode of the second transistor is electrically connected to the third wiring. The first and second electrodes of the capacitor are electrically connected to the first and fourth wirings, respectively.
1. A medical instrument comprising:
a drive waveform generator which generates a drive waveform signal;
a modulator which performs pulse modulation on the drive waveform signal to generate a modulated signal;
a multilayer wiring board having:
a first wiring, a second wiring, a third wiring, and a fourth wiring formed in a first wiring layer,
a fifth wiring formed in a second wiring layer,
a first via conductor electrically connecting the third wiring and the fifth wiring, and
a second via conductor electrically connecting the fourth wiring and the fifth wiring;
a first transistor, a second transistor, and a capacitor mounted on the first wiring layer side of the multilayer wiring board,
wherein the drain electrode of the first transistor is electrically connected to the first wiring, the source electrode of the first transistor is electrically connected to the second wiring, the drain electrode of the second transistor is electrically connected to the second wiring, the source electrode of the second transistor is electrically connected to the third wiring, the first electrode of the capacitor is electrically connected to the first wiring, and the second electrode of the capacitor is electrically connected to the fourth wiring,
wherein, when the multilayer wiring board is viewed in plan view, at least a part of the first transistor, at least a part of the second transistor, and at least a part of the capacitor are arranged on the same line, and
wherein the second wiring and the fifth wiring are formed at positions at least partially overlapping each other when the multilayer wiring board is viewed in plan view, and
wherein the multilayer wiring board receives the modulated signal on a gate electrode of the first transistor and a gate electrode of the second transistor, and generates an amplified digital signal as a signal obtained through power amplification on the modulated signal; and
a low pass filter which smoothes the amplified digital signal to generate a drive signal.
2. The medical instrument according to claim 1 , wherein the multilayer wiring board further has a sixth wiring formed in a wiring layer other than the first wiring layer, and a third via conductor electrically connecting the first wiring and the sixth wiring.
3. A medical instrument comprising:
a drive waveform generator which generates a drive waveform signal;
a modulator which performs pulse modulation on the drive waveform signal to generate a modulated signal;
the medical instrument according to claim 2 which receives the modulated signal on the gate electrode of the first transistor and the gate electrode of the second transistor, and generates an amplified digital signal as a signal obtained through power amplification on the modulated signal; and
a low pass filter which smoothes the amplified digital signal to generate a drive signal.
4. The medical instrument according to claim 1 , wherein the multilayer wiring board further has a seventh wiring formed in a wiring layer other than the first wiring layer, and a fourth via conductor electrically connecting the second wiring and the seventh wiring.
5. A medical instrument comprising:
a drive waveform generator which generates a drive waveform signal;
a modulator which performs pulse modulation on the drive waveform signal to generate a modulated signal;
the medical instrument according to claim 4 which receives the modulated signal on the gate electrode of the first transistor and the gate electrode of the second transistor, and generates an amplified digital signal as a signal obtained through power amplification on the modulated signal; and
a low pass filter which smoothes the amplified digital signal to generate a drive signal.
6. The medical instrument according to claim 4 , wherein the multilayer wiring board further has
an eighth wiring formed in the first wiring layer,
a ninth wiring formed in the second wiring layer, and
a fifth via conductor electrically connecting the second wiring and the ninth wiring,
the gate electrode of the first transistor is electrically connected to the eighth wiring, and
the eighth wiring and the ninth wiring are formed at positions at least partially overlapping each other when the multilayer wiring board is viewed in plan view.
7. A medical instrument comprising:
a drive waveform generator which generates a drive waveform signal;
a modulator which performs pulse modulation on the drive waveform signal to generate a modulated signal;
the medical instrument according to claim 6 which receives the modulated signal on the gate electrode of the first transistor and the gate electrode of the second transistor, and generates an amplified digital signal as a signal obtained through power amplification on the modulated signal; and
a low pass filter which smoothes the amplified digital signal to generate a drive signal.
8. The medical instrument according to claim 1 ,
wherein the multilayer wiring board further has a tenth wiring formed in the first wiring layer, the gate electrode of the second transistor is electrically connected to the tenth wiring, and the fifth wiring and the tenth wiring are formed at positions at least partially overlapping each other when the multilayer wiring board is viewed in plan view.